Granted Patent
Utility
US 6,812,839 · App. 09/818,276
Use of rotating magnetic field to enhance communication with RF burst-transmitting tags of object location system
Inventors:
Donald K. Belcher, Ronald J. Hash
Patented Case
View Patent ↗
Granted: Nov 2, 2004
Filed: Mar 27, 2001
Inventors
Donald K. Belcher
Ronald J. Hash
Assignee (at issue)
Wherenet Corp
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.