Granted Patent
Utility
US 6,583,676 · App. 09/886,237
Proximity/touch detector and calibration circuit
Inventors:
Christoph H. Krah, Richard D. Cappels
Patented Case
View Patent ↗
Granted: Jun 24, 2003
Filed: Jun 20, 2001
Inventors
Christoph H. Krah
Richard D. Cappels
Assignee (at issue)
Apple Computer Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.