| All Patents in class 403/146 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 25,460 | Sep. 13, 1859 | H. Whitmore, D.M. Smith | Folding Rule Joint | folding rule joints |
| 172,007 | Jan. 11, 1876 | H.H. Evarts | Improvement in friction-joints for school-desks | desks and tables |
| 588,294 | Aug. 17, 1897 | C.E. Riecker | Rule-Joint | folding rule joints |
| 713,255 | Nov. 11, 1902 | F.L. Traut | Joint for Extension Rules | folding rule joints |
| 765,598 | Jul. 19, 1904 | B. Schlag | Extension Rule | folding rule joints |
| 827,480 | Jul. 31, 1906 | J.A. Traut | Extension Rule | folding rule joints |
| 1,226,173 | May 15, 1917 | C.F. Benjamin | Combined Carpenter's Square and Miter-Gage | carpenter squares |
| 1,512,728 | Oct. 21, 1924 | C.G. Watson | Spring Joint for Extension Rules | folding rule joints |
| 1,718,505 | Jun. 25, 1929 | C.G. Watson | Spring Joint for Folding Rule | folding rule joints |
| 1,829,975 | Nov. 03, 1931 | E.J. Witchger | Joint for Folding Rules | folding rule joints |
| 4,936,701 | Jun. 26, 1990 | J.S. Amtmann, K.D. Allen | Universal Joint with Rotating Holder Sleeve | socket wrenches |
