nly, after the grant of the Canadian patent.

The construction or manufacturing of the invention in Canada must be
commenced within two years from the date of the patent, and continuously
carried on from that time, though the extension of this time may be
secured upon timely application to the Commissioner, giving any good and
proper reason. The time for importation is also sometimes extended upon
proper application.

Canadian patents are granted originally for a term of eighteen years,
the Government fee being $60 for the eighteen years, but at the election
of the patentee this fee may be divided into three payments of $20 each,
as follows: $20 at the time of the grant, $20 at the expiration of the
sixth year, if the owner desires to keep the patent alive, if not he can
allow the patent to become forfeited; and at the end of the twelfth
year, if it is still desired to maintain the patent, the remaining fee
of $20 may be paid. If the patentee in the meantime assigns his patent,
the assignee will pay the required government fees at the end of the
sixth and twelfth years, if it is desired to maintain its validity.

The Canadian patent covers and affords full protection in the following
provinces:

------------------------+----------+-------------
PROVINCES. | Area | Population
|Sq. Miles.| 1911
------------------------+----------+-------------
Alberta | 253,000 | 372,919
British Columbia | 390,000 | 362,768
Manitoba | 72,870 | 454,691
New Brunswick | 28,000 | 351,815
Nova Scotia | 20,600 | 461,847
Ontario | 222,000 | 2,519,902
Prince Edward Island | 2,000 | 93,722
Quebec | 347,000 | 2,000,697
Saskatchewan | 250,000 | 453,508
Northwest Territories |1,922,750 | 10,000
Yukon | 200,000 | ----
|----------+------------
TOTAL |3,708,220 | 7,081,869
------------------------+----------+------------

[Sidenote: Selling Canadian Patents.]

In selling Canadian patents, the patentee will proceed in much the same
way as in the United States, though he cannot expect, nor should he ask,
more than about one-third as much for the Canadian patent as he
receives, or expects, from the United States patent. Patents are not as
readily sold in Canada as here, but if the inventor has a use