| All Patents in class 29/DIG.09 |
Patents 1 -
10
of 15
      |
| Picture | Number | Date | Patentee | Title |
 | 115,451 | May 30, 1871 | J.N. Durrell | Improvement in machines for tapping nuts |
 | 142,511 | Sep. 02, 1873 | S.W. Putnam, Jr. | Improvement in machines for tapping nuts |
 | 159,723 | Feb. 09, 1875 | C. Van Haagen | Improvement in grinding apparatus |
 | 367,331 | Jul. 26, 1887 | W.F. Barnes | Grindstone-frame |
 | 399,344 | Mar. 12, 1889 | J.M. Petersen | Machine for fitting the ends of band-saws |
 | 575,737 | Jan. 26, 1897 | A.S. Robinson | Machine for grinding knives of cutter-bars |
| | 609,803 | Aug. 30, 1898 | J.F. Gilliland | Box-making machine |
 | 622,212 | Apr. 04, 1899 | R. Dutton | Twist-drill grinder |
 | 1,090,299 | Mar. 17, 1914 | A.M. Harrington, R.F. Scott | Bolt-cutting machine |
| | 1,486,155 | Mar. 11, 1924 | A.M. Morgan | Bung-hole reamer |
