| All Patents in class 33/544 |
Patents 1 -
8
of 8
      |
| Picture | Number | Date | Patentee | Title |
 | 339,410 | Apr. 06, 1886 | A. Heydrich | Adjustable interior-calipers |
 | 367,473 | Aug. 02, 1887 | J. Tickell | Caliper Gage |
 | 379,423 | Mar. 13, 1888 | W.D. Spencer | Depth-Gage |
 | 382,854 | May 15, 1888 | H.C. Balsbbaugh | Slip and Shrinkage Gage |
| | 1,591,258 | Jul. 06, 1926 | W. Ames | Cylinder Gauge |
| | 1,922,758 | Aug. 15, 1933 | K. Christopherson | Micrometer Depth Gauge |
 | 2,855,686 | Oct. 14, 1958 | C. Zelnick | Measuring rod locking means for depth gauge micrometers |
 | 3,128,559 | Apr. 14, 1964 | R.R. Winter | Depth Micrometer |
