| All Patents in class 451/16 |
Patents 1 -
15
of 22
      |
| Number | Date | Patentee | Title | Type |
| 493,008 | Mar. 07, 1893 | C.B. Beardsley | Lathe Attachment | metal lathe accessories and attachments |
| 820,519 | May 15, 1906 | J.G. Pool | Tool-Grinding Machine | tool grinders |
| 925,867 | Jun. 22, 1909 | W.L. Bryant | Multispindle metal-grinding machine | grinders |
| 1,261,083 | Apr. 02, 1918 | J.S. Wilcox, Jr. | Wheel Feed for Grinding Machines | |
| 1,287,342 | Dec. 10, 1918 | G.H. Knight | Tool Feed Mechanism for Shapers | metal shapers |
| 1,290,896 | Jan. 14, 1919 | W.L. Bryant | Machine for grinding metal | cylindrical grinders |
| 1,672,117 | Jun. 05, 1928 | S. Einstein | Centralized Control for Grinders | grinding machines |
| 1,683,859 | Sep. 11, 1928 | F.P. Brown | Grinding machine | |
| 1,684,792 | Sep. 18, 1928 | S. Einstein | Grinding Machine Having Balanced Spindle | grinding machines |
| 1,788,475 | Jan. 13, 1931 | C.E. Van Norman | Feed mechanism for grinding machines | grinders |
| 1,846,956 | Feb. 23, 1932 | S. Einstein, F. Haas, L.F. Nenninger | Grinding Machinery | grinding machines |
| 1,861,279 | May 31, 1932 | M.I. Mathewson | Grinding Machine | |
| 1,928,162 | Sep. 26, 1933 | H.H. Asbridge | Precision grinding or abrading machine | grinding machines |
| 1,932,969 | Oct. 31, 1933 | J.E. Caster, C.W. Hopkins | Grinding Machine | grinding machines |
| 1,935,633 | Nov. 21, 1933 | H.R. Isler | Grinding Machine | tool grinders |
