| Patents for Robert J. O. Simpson |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 1,625,401 | Apr. 19, 1927 | R.J. Simpson | Cylinder Gauge | cylinder gages |
| 1,625,766 | Apr. 19, 1927 | R.J. Simpson | Dial Indicator | measurement gauges |
| 1,625,767 | Apr. 19, 1927 | R.J. Simpson | Micrometer Caliper | micrometers |
| 1,698,566 | Jan. 08, 1929 | R.J. Simpson | Case for measuring tapes and the like | tape measures |
| 1,821,398 | Sep. 01, 1931 | R.J. Simpson | Micrometer Calipers | micrometers |
| 1,847,906 | Mar. 01, 1932 | R.J. Simpson | Cylinder Gauge | cylinder gages |
| 1,965,131 | Jul. 03, 1934 | R.J. Simpson | Alignment Gauge | alignment gages |
| 1,977,863 | Oct. 23, 1934 | R.J. Simpson | Drum Frictioning Device | tape measure mechanisms |
