| Patents for Charles H. Luther Jr. |
Patents 1 -
15
of 24
      |
| Number | Date | Patentee | Title | Type |
| 359,943 | Mar. 22, 1887 | G.H. Smith | Attachment for Grinding Machines | grinding attachments |
| 441,997 | Dec. 02, 1890 | G.E. Whitehead | Grinding Machine | grinding machines |
| 517,287 | Mar. 27, 1894 | E. Myers | Milling Machine | milling machines |
| 549,832 | Nov. 12, 1895 | C.A. Taft | Grinding Mechanism | grinding machines |
| 557,302 | Mar. 31, 1896 | C. Chretien | Combination Square | try squares |
| 557,445 | Mar. 31, 1896 | F. Spalding | Micrometer Gage | micrometers |
| 591,363 | Oct. 05, 1897 | F. Spalding | Calipers | calipers |
| 597,335 | Jan. 11, 1898 | F. Spalding | Micrometer Depth Gage | micrometer depth gauges |
| 626,876 | Jun. 13, 1899 | E.C. Thurston, F. Spalding | Micrometer Calipers | micrometers |
| 629,487 | Jul. 25, 1899 | J.T. Boufford | Floor Scraper | scrapers |
| 645,838 | Mar. 20, 1900 | F. Spalding | Micrometer Gage | micrometers |
| 676,637 | Jun. 18, 1901 | F. Spalding | Micrometer Caliper | micrometers |
| 679,944 | Aug. 06, 1901 | C. Carleton | Hair Clipper | hair clippers |
| 691,198 | Jan. 14, 1902 | J. Staphans | Bolt Pointing Machine | metalworking machines |
| 692,476 | Feb. 04, 1902 | F. Richardson | Tool Heater | |
