| All Patents in class 33/501 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 61,926 | Feb. 12, 1867 | J.S. Copeland | Screw Gage | measurement gauges |
| 196,976 | Nov. 13, 1877 | H.W. Hill | Gage for Handling and Distributing Paper, Circulars, &c. | paper gages |
| 362,816 | May 10, 1887 | G.W. Burchard | Scale for Indicating the Butter Value of Milk and Cream | measuring apparatus |
| 586,441 | Jul. 13, 1897 | H.T. Kingsbury | Rim-spacing machine | horizontal drilling machines |
| 746,622 | Dec. 08, 1903 | A.J. Wold | Slip and Shrinkage Gage | bore gages |
| 759,512 | May 10, 1904 | H. Frahm | Method of Measuring the Revolutions of Rotating Shafts | rpm speed gauges and tachometers |
| 1,017,639 | Feb. 13, 1912 | E.C. Mershon | Gage for straight-edges | saw sharpening tools |
| 1,107,276 | Aug. 18, 1914 | H.P. Farrington | Combination Tool | combination tools |
| 1,512,823 | Oct. 21, 1924 | P.J. Darlington | Micrometer Caliper | micrometers |
| 2,052,153 | Aug. 25, 1936 | H.H. Willis | Spherometer | measurement gauges |
| 2,548,490 | Apr. 10, 1951 | O.A. Muller | Depth and Angle Gauge | micrometer depth gauges |
| 3,263,374 | Aug. 02, 1966 | P.J. Gruber, A.D. Stuckey | Roll Grinder Comparator Gauge | roll grinding machines |
