He was granted 10 American, 1 British and 2 Canadian patents.

Hatschek was granted a Canadian patent for a "projection apparatus" on July 27, 1926.

Thomas Edison obtained an exclusive license to the Canadian patent.

They also granted Edison an exclusive licence to their equivalent Canadian patent.

However, on 7 October 2003, Canadian patent 1,341,442 was granted to Harvard College.

A Canadian patent followed in 1932.

This development work resulted in three Canadian patents.

Translucent concrete has been first mentioned in a 1935 Canadian patent.

Canadian patents should be given a purposive construction.

The same goes for the Canadian patent.