Foot operated track ball

Details Foot operated track ball Foot operated track ball

1995-12-12

1997-10-21

Tung, M. H.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

1402

Patent

active

D03852628

REFERENCES:
patent: D342298 (1993-12-01), Schnabel, Jr. et al.
patent: D365342 (1995-12-01), Evenson et al.
patent: D365610 (1995-12-01), Fraser
patent: D366037 (1996-01-01), Kawauchi et al.
patent: 1115432 (1914-10-01), Hubbell

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