Appeal No. 1998-1105 Page 3
Application No. 08/300,599
Claim 13, which is representative for our purposes,
follows:
13. A method for communicating over mains power
lines
which carry AC power at a known power line
frequency, comprising the steps of:
(a) initially transmitting a message over the
mains power lines at a first bit rate,
without synchronization to the power line
frequency; and
(b) if no acknowledgment is received after said
step (a), then retransmitting at least
part of the message, at a second bit
rate which is lower than said first
bit rate, with error correction coding
and with synchronization to the power
line frequency.
The references relied on in rejecting the claims follow:
Baker 4,479,215 Oct. 23, 1984
Clark et al. (Clark) 4,829,526 May 9, 1989
Sargeant et al. (Sargeant) 5,491,463 Feb. 13, 1996.
Claims 1-7 and 13-16 stand rejected under 35 U.S.C. § 103(a)
as obvious over Baker in view of Clark further in view of
Sargeant. Rather than repeat the arguments of the appellant
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 Next
Last modified: November 3, 2007