| All Patents in class 408/25 |
Patents 16 -
30
of 32
      |
| Number | Date | Patentee | Title | Type |
| 505,844 | Oct. 03, 1893 | A.Y. Pearl | Auger | auger bits |
| 507,020 | Oct. 17, 1893 | E.B. Mansfield | Machine for making parts of pianoforte-actions | music instrument maker |
| 518,262 | Apr. 17, 1894 | C.W. Meggenhofen, A.S. Cortright | Boring-machine | drill bits |
| 552,072 | Dec. 24, 1895 | C.C. Parke | Saw Swage | saw swages |
| 565,500 | Aug. 11, 1896 | A.Y. Pearl | Auger | auger bits |
| 567,796 | Sep. 15, 1896 | W.W. Shailer, H.P. Chapman | Automatic machine for producing piano-action parts | music instrument maker |
| 606,575 | Jun. 28, 1898 | A.Y. Pearl | Auger | auger bits |
| 689,035 | Dec. 17, 1901 | E.F. Brainard | Boring and tenoning machine | tenoning machines |
| 788,941 | May 02, 1905 | A.Y. Pearl | Auger | auger bits |
| 796,095 | Aug. 01, 1905 | W. Wattie | Drilling-machine | drilling and boring |
| 1,297,740 | Mar. 18, 1919 | C.H. Schmidgall | Boring-tool | mortising machines |
| 1,669,423 | May 15, 1928 | C.H. Schmidgall | Boring tool | mortising machines |
| 1,753,628 | Apr. 08, 1930 | E. Schweizer | Machine for making spools or bobbins | spool or bobbin machines |
| 2,215,369 | Sep. 17, 1940 | G.O. Gabriel | Metal Working Machine and Method | milling machines |
| 2,701,482 | Feb. 08, 1955 | G.L. Otto | Milling and center-drilling machine | milling machines |
