| Patents for William Petersen |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 1,392,443 | Oct. 04, 1921 | W. Petersen | Wrench | locking pliers |
| 1,489,458 | Apr. 08, 1924 | W. Petersen | Wrench | locking pliers |
| 2,201,918 | May 21, 1940 | W. Petersen | Wrench | locking pliers |
| 2,280,005 | Apr. 14, 1942 | W. Petersen | Wrench | locking pliers |
| 2,481,866 | Sep. 13, 1949 | W. Petersen | Sliding-Jaw, Lever and Rack Actuated Wrench | locking pliers |
| 2,711,663 | Jun. 28, 1955 | W. Petersen | Toggle Locking Wrenches | locking pliers |
| 2,838,973 | Jun. 17, 1958 | W. Petersen | Releasing Means for Self Locking Plier Type Toggle Wrench | locking pliers |
| 2,853,910 | Sep. 30, 1958 | W. Petersen | Latch Means for Plier type Toggle Wrench | locking pliers |
