Ball bearing swivel

Machines not elsewhere specified – Material working – abrading – or founding machinery – Element or attachment

Design Patent

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Design Patent

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29256522

CLAIM:
The ornamental design for a ball bearing swivel, as shown and described.

REFERENCES:
patent: 3307888 (1967-03-01), Dumpis
patent: 4552481 (1985-11-01), Bluett
patent: 5028117 (1991-07-01), Muhlenkamp-Becker
patent: D346423 (1994-04-01), Kitagawa
patent: 5749812 (1998-05-01), Feciura et al.
patent: 6357954 (2002-03-01), Timoney
patent: D456827 (2002-05-01), Butts
patent: 6461071 (2002-10-01), Kanemura
patent: 6491329 (2002-12-01), Smith
patent: 2004/0018042 (2004-01-01), Smith
patent: 2007/0031183 (2007-02-01), Sim

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