Office swivel chair

Design Patent

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Design Patent

active

D0507422

CLAIM:
The ornamental design for an office swivel chair, as shown.

REFERENCES:
patent: D196574 (1963-10-01), Sundberg et al.
patent: D205707 (1966-09-01), Cowen, Jr.
patent: D234382 (1975-02-01), Tacke
patent: D257473 (1980-11-01), Wilson
patent: D289236 (1987-04-01), Brauning
patent: D291631 (1987-09-01), de Boer
patent: D295701 (1988-05-01), de Boer
patent: D315066 (1991-03-01), Adams et al.
patent: D361214 (1995-08-01), Klein

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