Inventor
PIRTLE JOHN
US5 patents
Patents
5 patentsUS6133853AOct 17, 2000
Personal communication and positioning system
AMERICAN CALCAR INC391 citations98
US6924748B2Aug 2, 2005
Personal communication and positioning system
AMERICAN CALCAR INC92 citations97
US6515595B1Feb 4, 2003
Personal communication and positioning system
AMERICAN CALCAR INC222 citations97
US7236100B2Jun 26, 2007
Personal communication and positioning system
AMERICAN CALCAR INC48 citations95
US7561065B2Jul 14, 2009
Personal communication and positioning system
AMERICAN CALCAR INC12 citations91