| All Patents in class 29/520 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 625,491 | May 23, 1899 | M.D. Converse | Rivet | non worm cork extractors |
| 1,371,750 | Mar. 15, 1921 | W.R. Fox | Flexible shaft-coupling | |
| 1,902,878 | Mar. 28, 1933 | N.F. McNaught, E.H. Peterson | Ratchet wrench | ratchet wrenches |
| 2,017,154 | Oct. 15, 1935 | E.T. Larkin | Valve Seat Construction for Engines and the Like | valves |
| 2,313,312 | Mar. 09, 1943 | H.F. Bakewell | Toolholder | drill press chucks |
| 2,359,477 | Oct. 03, 1944 | J.H. Hoern | Method of Making Hollow Head Valves | internal combustion engine valves |
