| Patents Granted on 1900-02-20 |
Patents 1 -
15
of 16
      |
| Number | Date | Patentee | Title | Type |
| 643,632 | Feb. 20, 1900 | A.J. Cooper | Wrench | pipe wrenches |
| 643,703 | Feb. 20, 1900 | H.P. White | Drill-grinding machines | drill sharpening machines |
| 643,707 | Feb. 20, 1900 | C.S. Yarnell | Abrading or polishing machine | sanding machines |
| 643,711 | Feb. 20, 1900 | H.W. Locke, W.F. Carlton | Swing-back for Photographic Cameras | cameras |
| 643,713 | Feb. 20, 1900 | O.E. Converse | Boring attachment for metal-working lathes | metal lathe accessories and attachments |
| 643,720 | Feb. 20, 1900 | H.W. Locke | Swing-back for Photographic Cameras | cameras |
| 643,782 | Feb. 20, 1900 | J.R. Thame | Fiber Pulley | industrial machine pulleys and belt drive mechanisms |
| 643,876 | Feb. 20, 1900 | F. Lane | Pressure Gage | vacuum and pressure gauges |
| 643,914 | Feb. 20, 1900 | E.F. Shaw | Trowel Grinding Machine | grinding machines |
| 643,927 | Feb. 20, 1900 | O.S. Walker | Drill-grinder | drill sharpening machines |
| 643,960 | Feb. 20, 1900 | G. Crighton, A.M. Grimond | Bobbin-making machine | specialty woodworking machines |
| 643,991 | Feb. 20, 1900 | G.B. Taylor | Machine for Cutting Spiral End Helical Teeth in Chuck Jaws | gear making machines |
| 643,995 | Feb. 20, 1900 | H.L. Whitman | Cotton-press | cotton presses |
| 644,004 | Feb. 20, 1900 | J.F. Craig | Explosive Eugine | internal combustion engines |
| 644,027 | Feb. 20, 1900 | W. Baines | Hydrocarbon-Vaporizer for Explosive-Engines | fuel systems |
