| Patents for Lufkin Rule Company |
Patents 31 -
45
of 79
      |
| Number | Date | Patentee | Title | Type |
| 1,940,475 | Dec. 19, 1933 | E.J. Witchger, O.A. Koebke | Micrometer caliper | measurement gauges |
| 1,945,842 | Feb. 06, 1934 | E.J. Witchger | Tape measure | tape measures |
| 1,964,248 | Jun. 26, 1934 | E.J. Witchger, F. Buck | Method of Making Concavo-Convex Tape Measures | tape measures |
| 1,964,280 | Jun. 26, 1934 | E.J. Witchger | Tape measure | tape measures |
| 1,966,707 | Jul. 17, 1934 | F. Buck | Tape Measure | tape measures |
| 1,973,843 | Sep. 18, 1934 | F. Buck | Measuring Tape | tape measures |
| 1,987,652 | Jan. 15, 1935 | E.J. Witchger | Tape measure | tape measures |
| 2,005,850 | Jun. 25, 1935 | E.J. Witchger | Attachment for measuring tapes | |
| 2,022,756 | Dec. 03, 1935 | E.J. Witchger, F. Buck | Tape measure | tape measures |
| 2,090,495 | Aug. 17, 1937 | E.J. Witchger | Surface test indicator | |
| 2,122,875 | Jul. 05, 1938 | E.J. Witchger | Try square | squares |
| 2,136,769 | Nov. 15, 1938 | E.J. Witchger | Tape measure | tape measures |
| 2,151,255 | Mar. 21, 1939 | E.J. Witchger | Spring Nut | |
| 2,184,448 | Dec. 26, 1939 | E.J. Witchger | Coiling device for measuring rules | |
| D120,369 | May 07, 1940 | E.J. Witchger | Design for a case for tape measures | tape measures |
