| All Patents in class 408/20 |
Patents 16 -
30
of 55
      |
| Number | Date | Patentee | Title | Type |
| 448,195 | Mar. 17, 1891 | E.F. Barnes | Boring attachment for sawing machine | drilling and boring |
| 450,399 | Apr. 14, 1891 | E.A. Corliss, administratrix, G.H. Corliss, deceased (estate of) | Machine for Finishing Side Flanges of Cylinders of Steam Engines | steam engine cylinders |
| 461,202 | Oct. 13, 1891 | A.D. Pentz | Boring-engine | milling machines |
| 549,250 | Nov. 05, 1895 | T.P. Owen | Tool Holder for Jewelers Lathes | lathe tool holders and tool posts |
| 556,182 | Mar. 10, 1896 | I.L. Grady | Attachment for Watch Makers Lathes | metal lathe accessories and attachments |
| 613,008 | Oct. 25, 1898 | W.J. Hutson | Boring and mortising machine | drill presses |
| 617,462 | Jan. 10, 1899 | W.W. Davis | Combination tool | combination tools |
| 998,660 | Jul. 25, 1911 | F.J. Vlchek | Compound Tool | combination tools |
| 1,503,206 | Jul. 29, 1924 | A.W. Ojerholm | Combination valve grinder and drill | valve and seat maintenance |
| 1,812,685 | Jun. 30, 1931 | E. Cheshire | Composing room machine | printer |
| 2,074,095 | Mar. 16, 1937 | B. Sassen | Combined Pattern Controlled Machine Tool | profiling machines |
| 2,180,289 | Nov. 14, 1939 | A.C. Spangenberg, J.C. Carlton | Drilling and Honing Machinery | honing machines |
| 2,235,092 | Mar. 18, 1941 | E.L. Wall | Duplicating Machine | milling machines |
| 2,269,641 | Jan. 13, 1942 | R.M. Woytych | Machine Tool | horizontal boring mill attachments |
| 2,605,678 | Aug. 05, 1952 | O.W. Barker, J.B. Armitage | Milling and Boring Machine | milling machines |
