Homework 3: Validity of Graham Patent (Ackroyd)
From Bill Goodwine's Wiki
Litigated Patent: '798 (2627798) by Graham (1953)
Previous Patent: '811 (2493811) by Graham (1950)
Previous Patent: '451 (2014451) by Pfeifer (1935)
Litigated Patent: '798 (2627798) by Graham (1953)
Previous Patent: '811 (2493811) by Graham (1950)
Previous Patent: '451 (2014451) by Pfeifer (1935)