B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
77/31
B23B 51/00 (2006.01) B23B 51/04 (2006.01)
Patent
CA 1190419
ANNULAR CUTTER Abstract of the Disclosure An annular cutter having a cylindrical side wall provided with cutting teeth spaced circumferen- tially around its lower end, the inner periphery of each tooth being radially relieved to provide a narrow margin at the inner side of each tooth directly behind the cutting edge thereof.
409699
Hougen Everett D.
Marks & Clerk
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