Tools and hardware – Other tools and implements – Hammer type
Patent
1986-03-03
1989-08-22
Dunkins, Bruce W.
Tools and hardware
Other tools and implements
Hammer type
Patent
active
D03029336
REFERENCES:
patent: D251540 (1979-04-01), Faltin
patent: 252184 (1882-01-01), Chase
patent: D256322 (1980-08-01), Zabarte
Hammacher-Schlemmer Hardware, Tools & Supplies catalog, p. 586, railroad or clay pick.
Nupla Manufacturing Co. advertising brochure.
The Warren Group catalog, No. 375, p. 3, clay picks No. 5 & Ade Eye Coal Pick No. 18.
Dunkins Bruce W.
Heflin Clare E.
Zimmerman Harris
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