"The patent act" : Canada : revised May 2nd, 1898 : [an act respecting patents of invention, amended up to chap. 25, 60-61, Victoria, 1897]
"The patent act" : Canada : revised May 2nd, 1898 : [an act respecting patents of invention, amended up to chap. 25, 60-61, Victoria, 1897]
20 p. ; cm