Speed reducer for retractable screen systems

Photography and optical equipment – Photographic accessory – Screen or element thereof

Design Patent

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Design Patent

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D0502203

CLAIM:
The ornamental design for a speed reducer for retractable screen systems, as shown and described.

REFERENCES:
patent: 107747 (1870-09-01), Yates
patent: D181408 (1957-11-01), Cooley
patent: 2922471 (1960-01-01), Nicholas
patent: 4535829 (1985-08-01), Fukuchi
patent: 5634507 (1997-06-01), Kwoka
patent: 6082432 (2000-07-01), Kissinger
patent: 6158563 (2000-12-01), Welfonder et al.
patent: 6591890 (2003-07-01), Grubb

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