Power concrete hammer

Details Power concrete hammer Power concrete hammer

1986-07-22

1989-07-04

Dunkins, Bruce W.

Tools and hardware

Other tools and implements

With relative movement of parts while performing function

D 8 61, D 8 69

Patent

active

D03019675

REFERENCES:
patent: D242427 (1976-11-01), Wilsgaard
patent: 2518395 (1950-08-01), Sopris
patent: 2533487 (1950-12-01), Maurer et al.
patent: 3837409 (1974-09-01), Consoli et al.
Popular Mechanics, May 1987, p. 42, SKIL Concrete Buster.

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