| Patents for William F. Longfield |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 2,283,505 | May 19, 1942 | W.F. Longfield | Metalworking press | stamping presses |
| 2,287,689 | Jun. 23, 1942 | W.F. Longfield | Tie-plate punch | metal punching machines |
| 2,298,492 | Oct. 13, 1942 | W.F. Longfield | Automatic controlling apparatus for strip feeding mechanism | metal punching machines |
| 2,347,272 | Apr. 25, 1944 | W.F. Longfield | Sheet metal working press | stamping presses |
| 2,436,968 | Mar. 02, 1948 | W.F. Longfield | Combined clutch and brake | stamping presses |
| 2,441,543 | May 11, 1948 | W.F. Longfield | Combined clutch and brake | stamping presses |
| 2,441,544 | May 11, 1948 | W.F. Longfield | Strip uncoiler | sheet metal |
