Tools and hardware – Other tools and implements – Screwdriver type
Patent
1992-05-04
1994-09-20
Ansher, Bernard
Tools and hardware
Other tools and implements
Screwdriver type
Patent
active
D03506851
REFERENCES:
patent: 2667194 (1954-01-01), Fischer et al.
patent: 2718806 (1955-09-01), Clark
patent: 2806706 (1957-09-01), Fitch
patent: 2833548 (1958-05-01), Clark
patent: 4296656 (1981-10-01), Ernst
patent: 4466315 (1984-08-01), Boschettto, Jr. et al.
patent: 4535658 (1985-08-01), Molinari
patent: 4753142 (1988-06-01), Horniing
patent: 4787278 (1988-11-01), Bononi
patent: 5012708 (1991-05-01), Martindell
Perkins Allan S.
Perkins Fred H.
Ansher Bernard
Hyder Philip
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