Battery operated pencil sharpener with letter opener

Office supplies; artists and teachers materials – Office equipment not elsewhere specified – Perforating or cutting

Patent

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D8104, D19 65

Patent

active

D03788342

REFERENCES:
patent: D95992 (1935-06-01), Shaffer
patent: D193457 (1962-08-01), Fleming
patent: D246154 (1977-10-01), Tsang
patent: D306551 (1990-03-01), Yuen
patent: D320812 (1991-10-01), Yuen
patent: D337612 (1993-07-01), Carella
patent: D348484 (1994-07-01), Blackwell et al.
patent: 4741105 (1988-05-01), Wong

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