| All Patents in class 451/394 |
Patents 1 -
15
of 29
      |
| Number | Date | Patentee | Title | Type |
| 65,942 | Jun. 18, 1867 | T. Prosser | Grinding and Polishing Machine | polishing and buffing machinery |
| 425,230 | Apr. 08, 1890 | A.B. Landis | Grinding-machine | grinders |
| 434,115 | Aug. 12, 1890 | C.H. Norton | Grinding Machine | grinders |
| 453,022 | May 26, 1891 | C.H. Norton | Grinding Machine | grinders |
| 1,018,395 | Feb. 20, 1912 | A.B. Landis | Grinding-machine | grinders |
| 1,231,920 | Jul. 03, 1917 | T. Lumsden | Tool Holder for Grinding Machines | sharpening tool holders |
| 1,267,534 | May 28, 1918 | W.F. Fraser | Grinder | |
| 1,271,208 | Jul. 02, 1918 | J.S. Wilcox, Jr., C.H. Norton | Work Drive for Grinding Machines | |
| 1,515,568 | Nov. 11, 1924 | R.W. Ellingham, G.W. Fleming | Grinding machine | cylindrical grinders |
| 1,515,640 | Nov. 18, 1924 | L.W. Wheaton | Buffing Machine | polishing machines |
| 1,609,643 | Dec. 07, 1926 | L. Daly | Grinding Machine | grinding machines |
| 1,733,087 | Oct. 22, 1929 | L.R. Heim | Grinding Apparatus | grinding machines |
| 1,862,851 | Jun. 14, 1932 | F.S. Haas | Grinding Machinery | grinding machines |
| 1,881,984 | Oct. 11, 1932 | C.E. Van Norman | Slide Mechanism for Precision Grinding Machines | grinding machines |
| 1,975,947 | Oct. 09, 1934 | S. Einstein, H.R. Isler | Machine Tool | tool grinders |
