| All Patents in class 33/501.17 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 643,080 | Feb. 06, 1900 | J. Boulet | Gear Tooth Calipers | measurement gauges |
| 1,512,626 | Oct. 21, 1924 | P.M. Mueller | Bench Type Gear Testing Machine | gear measuring machines |
| 1,536,734 | May 05, 1925 | H.D. Tanner | Bevel Gear Testing Device | gear measuring machines |
| 1,732,730 | Oct. 22, 1929 | R.W. Porter | Method and Apparatus for Measuring and Comparing Gears and the Like | gear measuring machines |
| 1,812,369 | Jun. 30, 1931 | R.O. Beardsley, R.W. Porter | Projecting Mechanism and Gear Staging Device | gear measuring machines |
| 2,445,402 | Jul. 20, 1948 | B.V. Malmberg | Gear Testing Device | measurement gauges |
