Vision restrictor for athletic training

Details Vision restrictor for athletic training Vision restrictor for athletic training

1982-05-17

1984-07-31

Ansher, Bernard

Office supplies; artists and teachers materials

Teaching material

D 2234, D 2241, D 2253, D21199

Patent

active

D02749181

REFERENCES:
patent: D232097 (1974-07-01), Kirchner
patent: 2663021 (1953-12-01), Douglass
patent: 2866202 (1958-12-01), Landis
patent: 3333586 (1967-08-01), Bellis et al.
patent: 3613116 (1971-10-01), Stroup
patent: 4393519 (1983-07-01), Nicastro

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