Power hammer drill

Details Power hammer drill Power hammer drill

1988-03-08

1990-10-02

Herrmann, Winifred E.

Tools and hardware

Other tools and implements

With relative movement of parts while performing function

D 8 69

Patent

active

D03109364

REFERENCES:
patent: D301967 (1989-07-01), Sakamoto et al.
Kango Electric Hammers Catalog, 10/85, p. 3, Model No. 422, "Drilling Hammer".
Red Head Flyer, 10/75, Model No. 747, "Anchoring System".
HAC New Products, one page, 2/71, top figure, Hilti Hammer Drill, "Model No. TE-17".

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