| All Patents in class 29/DIG.91 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 157,700 | Dec. 15, 1874 | C. Sellers | Machines for Threading Bolts | |
| 1,076,947 | Oct. 28, 1913 | E.P. Bullard, Jr. | Cutting Lubricant Attachment for Machine Tools | metalworking machine mechanisms |
| 1,076,948 | Oct. 28, 1913 | E.P. Bullard, Jr. | Cutting-Lubricant Device for Machine-Tools | metalworking machine lubrication |
| 1,700,114 | Jan. 22, 1929 | C.H. Thompson | Surface Polishing Machine | polishing and buffing machinery |
| 2,063,756 | Dec. 08, 1936 | E.G. Roehm, M. Romaine | Broaching Machine | broaching machines |
| 2,073,079 | Mar. 09, 1937 | W. Peaslee, G.V. Johnston, F.J. Theler | Lapping Machine | grinding machines |
