GD

George C. Derbyshire

TM The Jacobs Manufacturing: 3 patents #4 of 17Top 25%
Overall (All Time): #1,305,957 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
4684139 Drill chuck — 1987-08-04
D259855 Drill chuck — 1981-07-14
4240771 Breast drills — 1980-12-23
4186933 Keys for drill chucks — 1980-02-05