Appeal No. 97-2879
Application No. 08/507,181
and 18.
The disclosed invention relates to a system in which a
terminal and a wristwatch communicate via electromagnetic
radiation having a wavelength shorter than radio waves. The
terminal periodically transmits a hailing message. If the
wristwatch receives the hailing message, then it transmits its
identification number to the terminal. The terminal will then
transmit messages addressed to the responding wristwatch.
Claim 16 is illustrative of the claimed invention, and it
reads as follows:
16. A system comprising in combination:
a terminal which broadcast hailing messages, said hailing
messages being broadcast repeatedly at a first periodic rate
utilizing electromagnetic radiation having a wave length
shorter than radio waves, and
a receiver comprising a periodically operative, wrist mounted,
battery operated device,
said receiver having a wristwatch form factor and an
identification number,
said receiver having means for receiving said hailing messages
and means for transmitting to said terminal said
identification number in response to the receipt of a hailing
message,
said means for transmitting utilizing electromagnetic energy
having a wave length shorter than radio waves for said
transmission,
2
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