Finger exerciser

Games – toys – and sports goods – Exercise equipment – For hand – wrist – or finger only

Patent

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Details

D21692, 2102

Patent

active

D04185609

REFERENCES:
patent: D294614 (1988-03-01), Ditsch et al.
patent: D352754 (1994-11-01), Silagy
patent: D359779 (1995-06-01), Peters et al.
patent: D385603 (1997-10-01), Ditsch
patent: 3738651 (1973-06-01), Norman et al.
patent: 4678181 (1987-07-01), Ditsch et al.
patent: 5147256 (1992-09-01), Silagy
patent: 5431611 (1995-07-01), Silagy
patent: 5533949 (1996-07-01), Hwang
Official Gazette, Apparatus for Developing the Muscles of the Hand, Mar. 10, 1931, p. 618.

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