| Patents for R. B. Tewksbury |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 965,403 | Jul. 26, 1910 | H.W. Oster | Die-stock | taps and dies |
| 977,540 | Dec. 06, 1910 | H.W. Oster | Thread-cutting mechanism | pipe threading machines |
| 977,541 | Dec. 06, 1910 | H.W. Oster | Die-stock | taps and dies |
| 1,044,808 | Nov. 19, 1912 | H.W. Oster | Die-stock | taps and dies |
| 1,128,034 | Feb. 09, 1915 | H.W. Oster | Die-stock | taps and dies |
| 1,139,063 | May 11, 1915 | H.W. Oster | Lathe attachment for stamping markings | |
| 1,150,449 | Aug. 17, 1915 | H.W. Oster | Die-stock | taps and dies |
| 1,258,239 | Mar. 05, 1918 | H.W. Oster | Tap | taps and dies |
| 1,280,823 | Oct. 08, 1918 | H.W. Oster | Mechanism for closing and finishing the ends of metal tubes | metalworking machines |
