| All Patents in class 33/836 |
Patents 31 -
40
of 40
      |
| Number | Date | Patentee | Title | Type |
| 1,553,387 | Sep. 15, 1925 | D. McDermott | Quick Acting Gauge | depth gauges |
| 1,952,965 | Mar. 27, 1934 | L.O. Beard | Instrument for measuring tappet-valve length while grinding valves and seats | valve and seat maintenance |
| 2,190,899 | Feb. 20, 1940 | F.J. Vierling | Gauge | depth gauges |
| 2,302,506 | Nov. 17, 1942 | J.H. Richards | Duplicating Attachment for Milling Machines | milling machine accessories |
| 2,548,490 | Apr. 10, 1951 | O.A. Muller | Depth and Angle Gauge | micrometer depth gauges |
| 2,580,445 | Jan. 01, 1952 | J. Longworth | Depth of Groove Gauge | measurement gauges |
| 2,957,247 | Oct. 25, 1960 | P.F. Grabbe, Jr., M.C. Brown | Groove Location and Width Gauge | measurement gauges |
| 3,195,237 | Jul. 20, 1965 | D.H. Aldeborgh | Dial Depth Gage | |
| 3,197,877 | Aug. 03, 1965 | D.H. Aldeborgh | Adjustable Setting Master for Dial Depth Gages | |
| 3,447,245 | Jun. 03, 1969 | W.B. Holdridge | Method for Cutting Radii on Workpiece | lathe tool holders and tool posts |
