Boring bit

Details Boring bit Boring bit

1976-09-27

1978-07-25

Douglas, Alan P.

Machines not elsewhere specified

Material working, abrading, or founding machinery

Element or attachment

D1509

Patent

active

D02486598

REFERENCES:
patent: D139844 (1944-12-01), Smith
patent: 2816464 (1957-12-01), Willingham
patent: 2842015 (1958-07-01), Miller
patent: 3794438 (1974-02-01), Knutsson

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