| Patents for John Bertram & Sons Co. |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| CA-218,231 | May 02, 1922 | A.W. Draeseke, A.W. Parkes | Boring mills | horizontal boring mills |
| CA-221,405 | Jul. 25, 1922 | A.W. Parkes | Metal shaper | metal shapers |
| CA-222,987 | Aug. 22, 1922 | A.W. Draeseke, A.W. Parkes | Planer | metal planers |
| CA-222,988 | Aug. 22, 1922 | A.W. Parkes | Feed ratchet for planers | metal planers |
| CA-235,280 | Oct. 30, 1923 | A.W. Parkes | Boring mill | vertical boring mills |
| CA-255,336 | Nov. 10, 1925 | A.W. Parkes | Slotting machine | metal slotting machines |
| CA-271,761 | Jun. 21, 1927 | A.W. Parkes | Bearing strip for machine tool ways | metalworking machine mechanisms |
| CA-293,545 | Oct. 01, 1929 | A.W. Parkes | Tool head swivelling and clamping means | metal planers |
| CA-293,546 | Oct. 01, 1929 | A.W. Parkes | Manual feeding and power traversing mechanism for planers | metal planers |
