| All Patents in class 403 |
Patents 496 -
510
of 708
      |
| Number | Date | Patentee | Title | Type |
| 1,718,505 | Jun. 25, 1929 | C.G. Watson | Spring Joint for Folding Rule | folding rule joints |
| 1,719,072 | Jul. 02, 1929 | H.L. Myers | Brush-retaining device | |
| 1,723,824 | Aug. 06, 1929 | M.E. Tobeler | Removable Tool Holder | sheet metal stamping dies |
| 1,723,985 | Aug. 06, 1929 | D.E. Richardson | Tool Holder | agricultural tool holders |
| 1,741,969 | Dec. 31, 1929 | W.S. Bellows | Detachable Connection for Wrench Sockets and the Like | socket wrenches |
| 1,790,238 | Jan. 27, 1931 | W.F. Klein | Socket Connection | socket wrenches |
| 1,797,730 | Mar. 24, 1931 | E.M. Pfauser | Socket Attachment for Tools | socket wrenches |
| 1,800,267 | Apr. 14, 1931 | G.D. Sundstrand | Over-arm-clamping means | |
| 1,820,677 | Aug. 25, 1931 | T.F. Rataiczak | Apparatus for treating foodstuffs | |
| 1,826,459 | Oct. 06, 1931 | K.C. Council | Tool Holder | tool handles |
| 1,829,975 | Nov. 03, 1931 | E.J. Witchger | Joint for Folding Rules | folding rule joints |
| 1,837,341 | Dec. 22, 1931 | L.S. Shaffer | Digging Tooth | |
| 1,851,304 | Mar. 29, 1932 | E.J. Fish | Lubricating Means | internal combustion engine lubrication |
| 1,862,337 | Jun. 07, 1932 | G.W. Emrick | Tap, drill, and similar tool | drill press chucks |
| 1,863,970 | Jun. 21, 1932 | F.V. Donald | Adjustable connecter | |
