| All Patents in class 29/213.1 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 426,320 | Apr. 22, 1890 | J.C. Powell | Rotating Steel File | filing machines |
| 775,252 | Nov. 15, 1904 | F.G. Schulze-Pillot | Disconnecting suspension device for heavy machine parts | |
| 900,337 | Oct. 06, 1908 | W.B. Wingate | Flue Plugger | boiler repair tools |
| 1,222,229 | Apr. 10, 1917 | R.L. Mapson | Valve Releasing Device | valve spring tools |
| 1,871,498 | Aug. 16, 1932 | I.J. Clark | Valve Lifter | valve spring tools |
| 1,917,183 | Jul. 04, 1933 | M.C. Dellinger, H.W. Kulp | Positioning Tool | pliers |
| RE19,414 | Jan. 08, 1935 | I.J. Clark | Valve Spring Compressor | valve spring tools |
