Appeal No. 97-2879 Application No. 08/507,181 Stoller teaches a prior art transmission technique in a broadcast environment such as in a portable cordless telephone (column 1, lines 39-41), wherein the transmitter of the portable unit transmits an identification number which must be validated at the receiving end in order to determine whether to grant access (column 2, lines 35-50). Stoller’s purpose is to provide a security system for a broadcast environment (column 1, lines 6-8). Therefore, it would have been obvious to one of ordinary skill in the art at the time the invention was made to incorporate Stoller’s use of identification numbers into the portable unit transmissions of Kawasaki in order to provide security in Kawasaki’s broadcast environment that includes cordless telephone (column 1, lines 14-15). 5Page: Previous 1 2 3 4 5 6 7 8 NextLast modified: November 3, 2007