| All Patents in class 409/178 |
Patents 1 -
15
of 16
      |
| Number | Date | Patentee | Title | Type |
| 49,203 | Aug. 01, 1865 | S. Wing | Water and Gas Fillings | valve reseating tools |
| 126,522 | May 07, 1872 | W.E. Cooper | Improvement in Devices for Boring Spherical Seats | drilling and boring tool holders |
| 900,149 | Oct. 06, 1908 | C.W. Danglemeyer | Portable Milling Machine | portable milling machines |
| 1,309,385 | Jul. 08, 1919 | L.I. Yeomans | Pad-facing machines | milling machines |
| 1,514,894 | Nov. 11, 1924 | R.L. Carter | Portable routing and profiling machine | handheld routers |
| 1,669,194 | May 08, 1928 | A.F. Froussard | Portable Milling Machine | milling machines |
| 1,948,698 | Feb. 27, 1934 | J.M. Christman | Tool Holder | drilling and boring tool holders |
| 1,981,269 | Nov. 20, 1934 | J.W. Holland | Valve seat grinder | valve and seat maintenance |
| 2,126,336 | Aug. 09, 1938 | A.W. Mall | Portable grinding machine | |
| 3,494,394 | Feb. 10, 1970 | P.G. Stock | Trimmer | handheld routers |
| 3,494,395 | Feb. 10, 1970 | J.W. Graham | Router | handheld routers |
| 3,581,787 | Jun. 01, 1971 | J.H. Bane | Transparent base for router | handheld routers |
| 4,778,316 | Oct. 18, 1988 | D.S. Strait | Portable Keymill | keyway cutting machines |
| 4,934,422 | Jun. 19, 1990 | R.M. Hempy, C.J. Baird, J.L. Haffely | Bench mountable plate joining machine | |
| 5,106,243 | Apr. 21, 1992 | C.C. Hunt | Portable Machine Tool | portable milling machines |
