| All Patents in class 451/304 |
Patents 16 -
30
of 30
      |
| Number | Date | Patentee | Title | Type |
| 1,286,697 | Dec. 03, 1918 | H.E. Manofsky | Sanding-machine | sanding machines |
| 1,628,531 | May 10, 1927 | G.H. Carlson | Oscillating belt sander | sanding machines |
| 1,974,806 | Sep. 25, 1934 | E.W. Curtis, A.V. Breed | Surfacing machine | sanding machines |
| 2,220,268 | Nov. 05, 1940 | J.O. Olsen | Machine tool | |
| 2,375,079 | May 01, 1945 | H.V. Christensen | Thread Grinding Machine | thread grinders |
| 2,798,340 | Jul. 09, 1957 | W.D. Roberts | Apparatus for grinding internal surfaces | metal sanding machines |
| 2,963,831 | Dec. 13, 1960 | G.J. Voelz | Sanding machine | belt sanders |
| 3,079,734 | Mar. 05, 1963 | W.A. Eschenburg | Vibrator mechanism for belt sander | sanding machines |
| 3,094,815 | Jun. 25, 1963 | R.F. Pendergast | Polishing apparatus | sanding machines |
| 3,509,667 | May 05, 1970 | K.L. Lindmark | Method of grinding welded rail | track maintenance machinery |
| 3,566,546 | Mar. 02, 1971 | K.L. Lindmark | Apparatus for grinding welded rail | track maintenance machinery |
| 3,665,650 | May 30, 1972 | W.C. Przygocki | Abrasive belt control apparatus and method | sanding machines |
| 4,262,455 | Apr. 21, 1981 | R. Rettew | Head Positioning for a Belt Grinder | surface grinders |
| 4,267,671 | May 19, 1981 | R. Rettew | Positioning Of An Abrasive Belt On A Grinding Machine | surface grinders |
| 4,407,096 | Oct. 04, 1983 | C.I. Steinback | Method and apparatus for surface grinding | sanding machines |
