IP Library › Granted Patent US 6,563,921
Granted Patent Utility
US 6,563,921 · App. 09/001,492

Automatic call director first in first out accessory

Inventors: Mark J. Williams, Gregory A. Nightingale
Patented Case View Patent ↗
Granted: May 13, 2003 Filed: Dec 31, 1997
Inventors
Mark J. Williams
Gregory A. Nightingale
Assignee (at issue)
VIRTUAL HOLD TECHNOLOGY, LLC

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Quick Facts
Patent No.
US 6,563,921
App. No.
09/001,492
Filed
1997-12-31
Granted
2003-05-13
Kind
B1