| All Patents in class 33/199B |
Patents 1 -
10
of 14
      |
| Picture | Number | Date | Patentee | Title |
| | 1,338,670 | May 04, 1920 | E.T. Bishop, W. Bolton | Means for Measuring the Pitch of Screws and the Like |
 | 1,357,813 | Nov. 02, 1920 | C.G. Olson | Testing Machine |
 | 1,359,943 | Nov. 23, 1920 | J.H. Wilhelm | Thread Testing Device |
| | 1,434,699 | Nov. 07, 1922 | F.O. Hoagland | Lead Gauge for Threads |
| | 1,470,836 | Oct. 16, 1923 | R. Hill | Lead Measuring Machine for Gauges |
| | 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 |
| | 1,898,084 | Feb. 21, 1933 | J.C. Drader | Lead Testing Machine |
| | 2,046,506 | Jul. 07, 1936 | J.C. Drader | Lead Testing Machine for Spiral Gears |
