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