| All Patents in class 408/21 |
Patents 1 -
14
of 14
      |
| Number | Date | Patentee | Title | Type |
| 3,872 | Dec. 31, 1844 | R.S. Hannaford, R.H. Penny, W.F. Converse | Machinery for Cutting Screws in the Posts and On the Rails of Bedsteads | wood threading machines |
| 143,273 | Sep. 30, 1873 | W.D. Chase | Machine for Cutting and Threading Pipes, &c. | pipe threading machines |
| 146,118 | Dec. 30, 1873 | J.B. Wright | Improvement in scroll-saws | scrollsaws |
| 319,502 | Jun. 09, 1885 | G.G. Morrison | Combined Drilling and Boring Machine | drilling and boring |
| 359,375 | Mar. 15, 1887 | G.F. Ballou | Drilling Fixture for Lathes | metal lathe accessories and attachments |
| 428,703 | May 27, 1890 | F.W. Taylor | Boring Bar Puppet | metal lathe accessories and attachments |
| 511,829 | Jan. 02, 1894 | G.E. Witherell | Turret Tool Machine | metal lathe accessories and attachments |
| 670,672 | Mar. 26, 1901 | G.W. Hoadley | Combination Metal and Wood Working Machine | drilling and boring |
| 838,827 | Dec. 18, 1906 | J.S. Waugh | Portable door-mortising machine | mortising machines |
| 1,515,620 | Nov. 18, 1924 | W.S. Runnels | Drilling and routing machine | printer |
| 2,069,296 | Feb. 02, 1937 | R.M. Woytych | Machine Tool and Method | horizontal boring mills |
| 2,341,383 | Feb. 08, 1944 | W.J. Johnson | Precision Boring Machine | horizontal boring mills |
| 2,888,965 | Jun. 02, 1959 | C.A. Phillips | Mountings for a portable electric motor | handheld power drill guides |
| 2,927,612 | Mar. 08, 1960 | J.W. Edgemond, Jr., H. Goldschmidt | Combination wood-working machine | tablesaws |
