Taxes.-A tax of £10 is payable before the end of the third year of the life of the patent, counting from the date of the application, and a further tax of £20, before the expiration of the seventh year. There are no provisions for extending the time for making payment.

Assignments. Should be prepared in duplicate. Any suitable form may be used. Working. There are no requirements.

DOCUMENTS REQUIRED.

1. Specification in duplicate.-May be signed by the applicant or his attorney. May be written on legal cap.

2. Drawings in duplicate.-On drawing board or tracing cloth, any convenient size. No signatures necessary.

3. Power of Attorney.-Signed by applicant and two witnesses.

BRITISH GUIANA.

LAW AND PRACTICE.

Who May be Patentee.-The true and first inventor, which is interpreted to include the true and first importer of the invention within the colony

Patents, Kind and Duration.-Patents of Invention (or Importation), granted for fourteen years, subject to the payment of the prescribed tax. The Patent will expire with any prior foreign patent for the same invention. A patent may usually be extended for an additional term of seven years upon due application made, and the payment of the prescribed tax.

Unpatentable.-The law provides that a patent may be declared void when it is shown that the grant of such patent is contrary to law, or prejudicial or inconveniet to the public in general, or that the invention is not a new invention as to the public use and exercise thereof, or that the patentee is not the true and first inventor within, the colony.

Novelty, Effect of Prior Patent or Publication.-To obtain a valid patent the application therefor must be filed before the invention has been publicly known or used in the Colony. Publication of the invention, or prior patents in other countries cannot affect the validity of a patent subsequently obtained in British Guiana, provided the invention has not been publicly known or used there at the time the application is filed.

Taxes.-A tax of $100 is payable to the government before the expiration of the seventh year of the life of the patent, counting from the day of the filing of the app ication. There is no provision made for obtaining an extension of the time for making this payment, and if the tax is not paid in time the patent will be lost.

Assignments.-These should be in the English language, and in duplicate, and ms * be in any suitable form. They should be legalized by a British Consul.

Working. There are no requirements.

DOCUMENTS REQUIRED.

1. Petition. Signed by applicant, and legalized by a British Consul.

2. Affidavit.-Signed by applicant. This should be made before a Notary Public and legalized by a British Consul.

3. Specification in duplicate.-May be written on any paper. Signed by appli cant, and legalized by a British Consul.

4. Drawings in duplicate.-May be of any convenient size, and on drawing board or tracing cloth. No signatures necessary.

5. Power of Attorney.-Signed by applicant, and legalized by a British Consul.

BRITISH HONDURAS.

LAW AND PRACTICE.

Who may be Patentee.-The first and true inventor, which is interpreted to include the first and true importer of the invention within the Colony.

Patents, Kind and Duration.-Patents of Invention (or Importation) granted for fourteen years, subject to the payment of the prescribed taxes. Extensions may sometimes be obtained for seven or fourteen years by making due application. In case of prior foreign patents, the patent will expire with the first expiring foreign patent.

Unpatentable.-The law is silent upon this point.

Novelty, Effect of Prior Patent or Publication.-To obtain a valid patent the application therefor must be filed before the invention has been published or otherwise become publicly known or used in British Honduras. Publication of the invention or the fact that prior patents have been obtained in other countries cannot affect the validity of a patent subsequently obtained in the colony, provided the invention is new there at the time the application is filed.

Taxes. A tax of $50 is payable to the government before the expiration of the third year of the life of the patent, counting from the day upon which the application is filed, and a further tax of $100 is payable before the expiration of the seventh year. There is no provision made for obtaining an extension of time for making these pay.

ments.

Assignments. These should be in the English language and in duplicate, and may be in any suitable form.

Working.-There are no requirements.

DOCUMENTS REQUIRED,

1. Petition.-Signed by applicant.

2. Declaration.-Signed by applicant. It may be made before any official competent to take the same, but had better be made before a British Minister or Consul when convenient.

3. Specification in Duplicate.-Written bookwise upon sheets of paper, each of the size of 211⁄2 inches in height by 1434 inches wide, leaving a clear margin of 11⁄2 inches on every side of the sheet; to be signed and sealed by the applicant.

4. Drawings in Duplicate.-Must be made upon a sheet or sheets of drawing paper or tracing cloth, each of the size of 211⁄2 inches in length by 1434 inches in breadth, or 214 inches in breadth, by 291⁄2 inches in length. No signatures required.

5. Power of Attorney.-Signed by applicant.

BRITISH NORTH BORNEO.

LAW AND PRACTICE.

Who may be Patentee.-The actual inventor, his heirs, executors, administrators and assigns; the first importer, or the holder of a British patent, or patent granted in any British Possession.

Patents, Kind and Term.-Patents of Invention f(or Importation), granted for the term of fourteen years from the date of the filing of the specification. Provision is made for the extension of the term of a patent for such further term, not to exceed fourteen years, as the Governor may see fit to direct. In case a prior patent for the same invention has been obtained in Great Britain, or in any British Possession, the patent will be granted for the unexpired term of such prior patent, and will expire therewith.

Unpatentable.-Section 4, of the law provides that no person shall be entitled to any exclusive privilege under the ordinance; if the invention is of no utility, or, it the invention, at the time of presenting the petition for leave to file the specification, was not a new invention within the meaning of the ordinance; or, if the petitioner is not the inventor thereof; or, if the specification filed, or the amended specification (if any), does not particularly describe and ascertain the nature of the invention, and in what manner the same is to be carried out, with the particulars required by section 11 of this ordinance; or, if the original or any subsequent petition relating to the invention, or the original or any amended specification, contain a willful or fraudulent misstatement.

Novelty, Effect of Prior Patent or Publication -The application must be filed before the invention has been publicly used in Great Britain, in the Colony, or in any other British Possession. Public use of the invention in fraud of the inventor, or if the knowledge thereof shall have been obtained surreptitiously, or in fraud of the inventor, or shall have been communicated to the public in fraud of the inventor, or in breach of confidence, will not be deemed a public use of the invention within the meaning of the ordinance, provided that the inventor shall, within six months after the commencement of such public use, apply for leave to file his specification, and shall not previously have acquiesced in such public use. It is also provided that the use of an invention in public by the inventor thereof, or by his servants or agents, or by any other person by his license in writing, shall not be deemed a public use thereof, within the meaning of the ordinance.

Taxes.-There are none after the issue of the patent.

Assignments. Should be prepared in duplicate. Any suitable form may be used. Working.-There are no requirements.

DOCUMENTS REQUIRED.

1. Petition.-Signed by applicant.

2. Declaration to Accompany Petition.-Signed by applicant.

3. Specification in duplicate.-Signed by applicant.

4. Declaration to Accompany Specification.-Signed by applicant.

5. Drawings in duplicate.-On drawing board or tracing cloth, any suitable size. No signatures.

6. Power of Attorney.-Signed by applicant.

7. Blue Book of British Patent, if any exist.

CANADA.

LAW AND PRACTICE.

Who may be Patentee.-The actual and true inventor, his assigns or his legal representatives. Joint inventors may obtain a joint patent. The patent may be issued to the inventor alone, or to the inventor and his assignees, or to his assignees alone, but the inventor must sign the papers in all cases, if he be alive. If the inventor be dead his assignee or legal representative may sign, stating in the oath that he believes that the inventor was the true and first inventor.

Patents. Kind and Term.-Patents of Invention, which are granted for eighteen years, subject to the payment of prescribed fees and proper working of the invention. In case of prior foreign patents, the patent will expire with the first expiring foreign patent. Extensions can only be obtained by special legislative act. Caveats may be filed by any intending applicant for a patent who has not yet perfected his invention, and the same will remain in force for one year. There is no provision for the renewal of Caveats.

Unpatentable.-Inventions which have an illicit object in view, or any mere scientific principle or abstract theorem.

Novelty, Effect of Prior Patent or Publication.-To obtain a valid patent the application should be filed before the invention has been in public use or on sale in Canada, with the consent or allowance of the inventor thereof, for more than one year, and in case a foreign patent exists for the same invention, before the expiration of twelve months from the date of such foreign patent. Section 16 of the law empowers the Commissioner of Patents to object to the grant of a patent for an invention which has been described in a book or other printed publication before the date of the application, or that is otherwise in possession of the public.

Taxes.-If the taxes for the full term of eighteen years are not paid before the issue of the patent, a tax of $20 is payable during and before the expiration of the sixth year of the life of the patent, and a further tax of $20 before the expiration of the twelfth year. No prolongation of time for making these payments can be obtained.

Assignments.-These should be in the English language and in duplicate. No special form of document is prescribed.

Working. The patent will be void at the end two of years, unless within that period the working of the invention shall have been commenced, and, after such commencement the construction or manufacture of the invention must be continuously carried on in Canada, in such manner that any person desiring to use it may obtain it, or cause it to be made for him, at a reasonable price, at some manufactory or establishment for making or constructing it in Canada. This term of two years may usually be extended for from six months to one year upon application, which must be made not more than three months before the expiration of the two year period. It is the present practice of the Commissioner to grant these extensions from year to year upon seasonable application. It is considered by good authorities in Canada, that the actual and continuous manufacture of the patented invention is not necessary to constitute a legal working, and it is now the practice to work the patent by concluding arrangements with some agent or manufacturer to be prepared to make the patented articles, and then to advertise that they can be obtained on application to the said agent or manufacturer.

Special. MARKING PATENTED ARTICLES.-Patented articles must be marked or stamped with the word "Patented," together with the year of the date of the patent; as, for instance, " Patented 1887," or as the case may be.

IMPORTATION OF PATENTED ARTICLES.-If the patentee or his assigns, or his or their representatives, after the expiration of twelve months from the grant of the patent (or any authorized extension of this time), imports the invention or causes the same to be imported into Canada, the patent will become void as to the interest of the person or persons so importing or causing the invention to be imported. The term for importing may usually be extended for a further period, by making proper application.

AMENDMENT OF SPECIFICATION.-The specification may be amended at any time by way of disclaimer. Patents may be re-issued and amended wherever they are deemed to be inoperative or defective, when it appears that the error arose from inadvertence, accident or mistake, without any fraudulent or deceptive intention.

MODELS OR SPECIMENS-Are no longer required in ordinary cases.

DOCUMENTS REQUIRED.

The papers should be written or printed on legal cap, on one side only.

1. Petition.-Signed by the applicant.

2. Power of Attorney.-Signed by the applicant and one or two witnesses. 3. Duplicate Specifications.-Both copies must be signed by the applicant and two witnesses.

4. Drawings in duplicate.-On tracing cloth. The sheets must measure exactly eight inches wide by thirteen inches high. As many sheets may be used as are necessary. Beside the drawings on tracing cloth it is necessary to furnish an additional view or views upon a sheet of good white bristol board of exactly the same size as the tracings. This last drawing is used by the Canadian Office to photo-lithograph from, and it is not necessary that it should include all the figures of the drawings; a single figure will be sufficient, provided it shows the entire invention clearly and fully. No reference letters are required upon the bristol board drawing. The drawings need not be signed by the applicant.

5. Oath.-Sworn, or affirmed to, and signed by the applicant. The oath may be made before any Justice of the Peace in Canada; but if the applicant is not at the time in Canada, the oath may be made before any Minister Plenipotentiary, Charge d' Affairs, Consul, Vice-Consul or Consular Agent, holding commission under the government of the United Kingdom of Great Britain, or any judge of a court of record, or a Notary Public, or the Mayor or other chief magistrate of any city, borough or town corporate in the country in which the applicant happens at the time to be. The oath must in all cases be attested by the proper official seal of the officer before whom the oath is taken.

CAPE COLONY.

(CAPE OF GOOD HOPE.)

LAW AND PRACTICE.

Who may be Patentee.-The true and first inventor, which is interpreted to include the true and first importer of the invention within the Colony.

Patents, Kind and Term.-Patents of Invention (or Importation) granted for fourteen years, but will expire with any first expiring prior foreign patent. The patent can sometimes be extended for an additional term of seven and perhaps fourteen years. The patent is dated as of the day upon which the application is filed.

Unpatentable.-The law is silent on this point.

Novelty, Effect of Prior Patent or Publication.-To obtain a valid patent the application therefor must be filed before any publication or public use of the invention within the Colony. Publication, or the fact that an invention has been patented, in a foreign country, does not prevent the obtaining of a perfectly valid patent so long as the invention is new within the Colony, at the time the application is filed.