| All Patents in class 33/810 |
Patents 31 -
38
of 38
      |
| Number | Date | Patentee | Title | Type |
| 1,516,631 | Nov. 25, 1924 | J.ď. ďErvillé | Sliding Caliper | measuring calipers |
| 1,555,792 | Sep. 29, 1925 | W. Souder | Dimensional Measuring Device | measuring apparatus |
| 1,663,217 | Mar. 20, 1928 | E.J. Ryan | Camber and Depth Gauge | measurement gauges |
| 1,958,024 | May 08, 1934 | A.L. Stowell | Friction Spring | rules |
| 2,529,931 | Nov. 14, 1950 | J.F. Gallup, Sr. | Auxilary Contact for Calipers | measurement gauges |
| 2,799,942 | Jul. 23, 1957 | H.W. Ehler | Unitary rule slide | vernier calipers |
| 3,869,801 | Mar. 11, 1975 | G.A. Lycan | Gauge for measuring the degree of alignment at the inner surfaces of two tubular members positioned end to end | special measuring tools |
| 5,343,624 | Sep. 06, 1994 | D.A. Symons | Measurement Tool | measurement gauges |
