| Patents for Keystone Mfg. Co. |
Patents 1 -
15
of 17
      |
| Number | Date | Patentee | Title | Type |
| 288,098 | Nov. 06, 1883 | C.H. Myers | Wrench | ratchet wrenches |
| 358,173 | Feb. 22, 1887 | C.J. Sturgeon | Circular sawing machine | specialty woodworking machines |
| 446,072 | Feb. 10, 1891 | C.H. Myers | Combined Ratchet Wrench & Screwdriver | wrench combination tools |
| 446,073 | Feb. 10, 1891 | C.H. Myers | Ratchet Wrench & Drill | wrench combination tools |
| 446,074 | Feb. 10, 1891 | C.H. Myers | Attachment for Metal Planers | metal planer accessories |
| 446,075 | Feb. 10, 1891 | C.H. Myers | Combined Ratchet Wrench & Boring Bit | wrench combination tools |
| 539,423 | May 21, 1895 | J. Emig | Ratchet Drill | hand drills |
| 541,875 | Jul. 02, 1895 | G.W. Packer | Corn Harvester | |
| 584,889 | Jun. 22, 1897 | G.W. Packer | Corn Husker | corn huskers |
| 637,534 | Nov. 21, 1899 | R.S. Swartout | Combined Corn Husker and Fodder Shredder | corn huskers |
| 869,255 | Oct. 29, 1907 | C.H. Myers | Wrench | ratchet wrenches |
| 1,021,558 | Mar. 26, 1912 | C.J. Scholler | Hand Ratchet for Drills, &c. | drill accessories |
| 1,534,537 | Apr. 21, 1925 | E.S. Miller | Holder for Socket Wrench Sets | wrench set holders |
| 1,696,444 | Dec. 25, 1928 | F.A. Haist, E.S. Miller | Holder for Socket Wrench sets | wrench set holders |
| 1,761,263 | Jun. 03, 1930 | F.A. Haist | Method of Making Ratchet Wrenches | ratchet wrenches |
