| Patents for J. D. H. Bergen |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 821,984 | May 29, 1906 | B.T. Burchardi, V.J. Wahlstrom | Clutch and counter-shaft mechanism | friction clutches |
| 866,245 | Sep. 17, 1907 | V.J. Wahlstrom | Chuck | drill chucks |
| 870,143 | Nov. 05, 1907 | V.J. Wahlstrom | Chuck | drill chucks |
| 870,206 | Nov. 05, 1907 | V.J. Wahlstrom | Clutch | friction clutches |
| 884,243 | Apr. 07, 1908 | V.J. Wahlstrom | Milling-machine | milling machines |
| 884,244 | Apr. 07, 1908 | V.J. Wahlstrom | Chuck | drill press chucks |
| 978,521 | Dec. 13, 1910 | V.J. Wahlstrom | Oil-cup | oil cups |
| 996,953 | Jul. 04, 1911 | V.J. Wahlstrom | Chuck | |
| 996,954 | Jul. 04, 1911 | V.J. Wahlstrom | Chuck | |
| 996,955 | Jul. 04, 1911 | V.J. Wahlstrom | Chuck | |
| 1,026,187 | May 14, 1912 | V.J. Wahlstrom | Chuck | |
