| Patents for none listed |
Patents 2821 -
2835
of 3270
      |
| Number | Date | Patentee | Title | Type |
| 4,139,939 | Feb. 20, 1979 | G.C. Crooks | Utility Knife | utility knives |
| 4,168,575 | Sep. 25, 1979 | M. Yamauchi, I. Sugizaki | Constant Pressure Measuring Micrometer | micrometers |
| 4,168,909 | Sep. 25, 1979 | J.W. Nelson, R.G. Knudsen, estate of (deceased) | Optical Toe Gauge with Angled Screens for Vehicle Wheels | |
| 4,174,916 | Nov. 20, 1979 | M. Kezran | Forming Tool Construction | insert tool holders |
| D254,655 | Apr. 08, 1980 | D. Brickwood | Micrometer | micrometers |
| 4,205,543 | Jun. 03, 1980 | R.D. Wright | Spring Winder | |
| CA-46,949 | Jun. 09, 1980 | n. listed | Tractor | tractors |
| 4,206,548 | Jun. 10, 1980 | P. Bergman | Measuring Tool for Taper Bores | measurement gauges |
| 4,207,679 | Jun. 17, 1980 | M.L. Poage | Micrometer | micrometers |
| 4,212,336 | Jul. 15, 1980 | W.C. Smith | Screwdriver | screwdriver handles |
| D256,339 | Aug. 12, 1980 | T. Konishi | Micrometer | micrometers |
| 4,218,942 | Aug. 26, 1980 | D.F. Buccicone | Inch/Metric Thread Dial | metal lathe accessories and attachments |
| GB-2,044,482 | Oct. 15, 1980 | I.B. Golding, J. Harman | Compensating Gear Transmission Errors in Positional Control Apparatus | machine tool controls |
| GB-2,051,630 | Jan. 21, 1981 | J. Harman | Indexing Mechanism for a Machine Tool | indexers and dividers |
| GB-2,053,748 | Feb. 11, 1981 | J. Harman | Locking Device for Indexing Mechanism for a Machine Tool | indexers and dividers |
