| Patents for Marshall Field |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| AU-120,058 | Jun. 11, 1945 | C.A. Wiken, H.V. Boehnke | Drilling machine | drill presses |
| GB-574,335 | Jan. 01, 1946 | C.A. Wiken | Grinder | cutter grinding |
| GB-583,087 | Dec. 09, 1946 | C.A. Wiken, H.V. Boehnke | Drilling and like machines | drilling and boring |
| GB-583,106 | Dec. 09, 1946 | C.A. Wiken, H.V. Boehnke | Drilling and like machines | drill presses |
| AU-123,057 | Jan. 16, 1947 | C.A. Wiken, E.A. Reisig | Machine tools | surface grinders |
| AU-125,599 | Oct. 09, 1947 | C.A. Wiken, E.A. Reisig | Improvements in or relating to machine tools | surface grinders |
| AU-125,600 | Oct. 09, 1947 | C.A. Wiken, E.A. Reisig | Improvements in or relating to machine tools | surface grinders |
