| Patents for Andrew J. Hamilton |
Patents 1 -
15
of 20
      |
| Number | Date | Patentee | Title | Type |
| 295,100 | Mar. 11, 1884 | S.H. Bellows | Combined Bevel and T-Square | protractors |
| 297,056 | Apr. 15, 1884 | S.H. Bellows | Caliper Rule | rules |
| 306,429 | Oct. 14, 1884 | H.M. Rich | Inclinometer | inclinometers |
| 318,051 | May 19, 1885 | L.S. Starrett | Screw Thread Gage | thread gages |
| 318,984 | Jun. 02, 1885 | J.J. Hedges | Bevel for Draftsmen or Artificers | protractors |
| 403,726 | May 21, 1889 | S.H. Bellows | Micrometer Gage | micrometers |
| 429,939 | Jun. 10, 1890 | C.L. Morse | Valve-reseating machine | automotive tools |
| 448,089 | Mar. 10, 1891 | L.S. Starrett | Micrometer Gage | micrometers |
| 474,699 | May 10, 1892 | L.S. Starrett | Bevel Protractor | protractors |
| 539,759 | May 21, 1895 | C.P. Fay, L.S. Starrett | Calipers and Dividers | dividers |
| 556,703 | Mar. 17, 1896 | C.P. Fay, L.S. Starrett | Surface Gage | surface gauges |
| 570,056 | Oct. 27, 1896 | C.F. Richardson | Spirit Level | levels |
| 582,154 | May 04, 1897 | E.C. Clapp | Micrometer Gage | micrometers |
| 582,517 | May 11, 1897 | S.H. Bellows | Shaft Level | machinist levels |
| D29,875 | Dec. 27, 1898 | B.E. Sawyer | Design for a Combination Square | try squares |
