Electronic ergometer

Details Electronic ergometer Electronic ergometer

1987-06-11

1989-05-23

Rademaker, Charles A.

Games, toys, and sports goods

Toy

Representation or scale model

Patent

active

D03012689

REFERENCES:
patent: 4538804 (1985-09-01), Zibell
patent: 4688791 (1987-08-01), Long
patent: 4709918 (1987-12-01), Grinblat
patent: 4749182 (1988-07-01), Duggan

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