US RE40,018 E1
Time-multiplexed short-range magnetic communications
Vincent Palermo, Westford, Mass. (US); Patrick J. Cobler, Nashua, N.H. (US); and Neal R. Butler, Acton, Mass. (US)
Assigned to Aura Communications Technology, Inc., North Andover, Mass. (US)
Filed on Nov. 06, 2001, as Appl. No. 9/993,328.
Application 08/841502 is a continuation in part of application No. 08/696812, filed on Aug. 13, 1996, granted, now 5,912,925.
Application 08/696812 is a continuation in part of application No. 08/444017, filed on May 18, 1995, abandoned.
Application 09/993328 is a reissue of application No. 08/841502, filed on Apr. 23, 1997, now 5,982,764, filed on Nov. 09, 1999.
Int. Cl. H04J 3/00 (2006.01)
U.S. Cl. 370—345  [455/41.1; 455/101; 340/870.31] 122 Claims
OG exemplary drawing
 
[ 5. A method for magnetic induction time-multiplexed two-way short-range wireless communications, comprising:
during a first period of time, generating from a first unit with a first unit transducer system a first inductive field and receiving the first inductive field at a second unit with a second unit transducer system, the first transducer system including multiple transducers; and
during a second period of time, generating from the second unit with the second unit transducer system a second inductive field and receiving the second inductive field at the first unit with the first transducer system, the second transducer system including at least one transducer, at least one transducer of the first or second transducer systems functioning as a transmitter and a receiver of an inductive field.]