| All Patents in class 409/78 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
| | 191,826 | Jun. 12, 1877 | L. Bollmann | Machines for Cutting Screw Threads |
| | 882,290 | Mar. 17, 1908 | J. Bowen | Machine for Cutting Screws, &c. |
 | 893,431 | Jul. 14, 1908 | J. Bowen | Machine for Cuting Screw, & c. |
| | 1,235,437 | Jul. 31, 1917 | N.D. Chard | Feed-screw gage |
 | 1,588,003 | Jun. 08, 1926 | B.H. Blood | Thread-hobbing machine |
 | 1,794,361 | Mar. 03, 1931 | L.F. Nenninger, B.P. Graves, E.J. Kearney, J.B. Armitage | Milling-Machine Spindle and Tool |
 | 2,923,206 | Feb. 02, 1960 | M. Kovac | Indexing Attachment for Milling Machines and the Like |
