| All Patents in class 33/199B |
Patents 1 -
14
of 14
      |
| Number | Date | Patentee | Title | Type |
| 1,338,670 | May 04, 1920 | E.T. Bishop, W. Bolton | Means for Measuring the Pitch of Screws and the Like | thread gages |
| 1,357,813 | Nov. 02, 1920 | C.G. Olson | Testing Machine | measurement gauges |
| 1,359,943 | Nov. 23, 1920 | J.H. Wilhelm | Thread Testing Device | measurement gauges |
| 1,434,699 | Nov. 07, 1922 | F.O. Hoagland | Lead Gauge for Threads | thread gages |
| 1,470,836 | Oct. 16, 1923 | R. Hill | Lead Measuring Machine for Gauges | thread measuring machines |
| 1,480,390 | Jan. 08, 1924 | J. Hartness | Apparatus for Inspecting and Gauging Screw Threads | |
| 1,480,611 | Jan. 15, 1924 | R. Hill | Measuring Machine | |
| 1,686,318 | Oct. 02, 1928 | G.B. Gallasch | Gauge | special purpose gauges |
| 1,898,084 | Feb. 21, 1933 | J.C. Drader | Lead Testing Machine | gear measuring machines |
| 2,046,506 | Jul. 07, 1936 | J.C. Drader | Lead Testing Machine for Spiral Gears | gear measuring machines |
| 2,307,680 | Jan. 05, 1943 | G. Hohwart | Tap Structure | taps and dies |
| 2,409,924 | Oct. 22, 1946 | R.E. Bauer | Thread Checker | measurement gauges |
| 2,431,021 | Nov. 18, 1947 | G.A. Bourdelais | Thread Checking Comparator Gauge | comparators |
| 2,491,403 | Dec. 13, 1949 | K.H. Wills | Indicator and Control Means for Lead Screw Correction | thread measuring machines |
