| All Patents in class 33/520 |
Patents 1 -
15
of 32
      |
| Number | Date | Patentee | Title | Type |
| 39,608 | Aug. 18, 1863 | F.B. Williams | Device for Centering Shafting | metal lathe accessories and attachments |
| 142,761 | Sep. 16, 1873 | S.H. Bellows | Machinists' Gages | special purpose gauges |
| 152,487 | Jun. 30, 1874 | G.F. Hawley | Device for Centering Cylinders | |
| 374,168 | Dec. 06, 1887 | C.E. Barnes | Device for Aligning Steam Engines | steam engines |
| 432,328 | Jul. 15, 1890 | J.A. Painter | Center and Mortise-Gage | center marking gauges |
| 467,562 | Jan. 26, 1892 | J.F. Sauerman | Combination Bevel & Surface Gage | bevel squares |
| 610,021 | Aug. 30, 1898 | C.V. Bogart | Centering Gage | center marking gauges |
| 611,625 | Oct. 04, 1898 | J.E. Goddard | Gaging Implement | punches |
| 657,136 | Sep. 04, 1900 | A.L. Schultz | Combination Tool | surface gauges |
| 715,445 | Dec. 09, 1902 | I.A. White | Centering Gage | special purpose gauges |
| 729,663 | Jun. 02, 1903 | F.L. Ress | Combination Square and Bevel | bevel squares |
| 769,196 | Sep. 06, 1904 | F. Spalding | Combination Tool | try squares |
| 794,170 | Jul. 11, 1905 | J.W. Fessler | Center Gauge | center marking gauges |
| 902,738 | Nov. 03, 1908 | L.J. Jones | Centering Device | center finders |
| 1,166,968 | Jan. 04, 1916 | J.E. Carter | Center Gage | center marking gauges |
