Ratchet wrench

Details Ratchet wrench Ratchet wrench

1986-04-15

1989-03-21

Dunkins, Bruce W.

Tools and hardware

Other tools and implements

Wrench

Patent

active

D03002969

REFERENCES:
patent: D199149 (1964-09-01), Greenlee
patent: 722450 (1903-03-01), Kershner
patent: 2963929 (1960-12-01), Barnes
patent: 4253356 (1981-03-01), Martinmaas
patent: 4485700 (1984-12-01), Colvin
patent: 4561329 (1985-12-01), Lack
Popular Science, May 1987, p. 88, Ratchet Wrench, top right of page.

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