TY - GEN T1 - Practical effects of Canada's changing from a first-to-invent to a first-to-file patent system / AU - Mcgraw, James, VL - 1991 No 33 pages 18-21 ID - 4891 KW - Patents KW - Industrial property KW - INDUSTRIAL PROPERTY : LEGISLATION KW - CANADA KW - INVENTION KW - PATENT SYSTEMS TI - Practical effects of Canada's changing from a first-to-invent to a first-to-file patent system / ER -