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| Patents for John Bertram & Sons | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-117,209 | Mar. 16, 1909 | H. Bertram | Metal planer | metal planers | |
| 927,628 | Jul. 13, 1909 | C.D. Young | Means for securing movable lathe-stocks | metal lathes | |
| CA-122,545 | Dec. 14, 1909 | C.D. Young | Means for securing movable lathestocks | metal lathes | |
| 2,353,246 | Jul. 11, 1944 | M.T. Knutzen | Control means for power-operated machine | ||
| 2,378,304 | Jun. 12, 1945 | M.T. Knutzen | Control means for power operated machinery | ||