Reexamination Control No. 90/005,742
Patent 5,253,341
1 immediately reproduced on a display system, such as a television display. Id. at col. 18, ll. 36-
2 37.
3 The ‘341 patent does not define or restrict the term “concentrator,” which is described
4 therein in part as follows:
5 Where a cluster of EUS's 10 cannot economically justify a single
6 dedicated server, a neighboring server in the Global Server Network 29
7 may be loaded with services for the said cluster of EUS's. In this case,
8 communication between an individual EUS 10 and the Server is
9 accommodated through a concentrator 19 which stores and forwards EUS
10 requests and corresponding server replies, thereby allowing for more
11 efficient utilization of the DDS communication channel.
12
13 '341 patent, col. 3, ll. 43-51.
14 (4) Claim 11 – obvious over Yurt in view of Kandell?
15 The examiner cites column 2, line 54 to column 3, line 5 of the "Background of the
16 Invention" portion of Kandell's specification as evidence that it would have been obvious to add
17 Kandell’s disclosed concentrator to Yurt in order "to allow for sharing of high speed access
18 among multiple users." 3d Action at 86-87, para. 19; Final Action at 243, para. 19. The cited
19 text reads:
20 Concentrators enable an efficient utilization of data channels in
21 digital data networks. Basically, a digital data network includes
22 modulator/demodulator ("modem") circuits for enabling digital
23 information to be transferred over a normal telephone network in an
24 analog form. When several subscribers in one area require only low-speed
25 data transfers, each subscriber is connected to a local concentrator at a
26 particular location by means of two low-speed modems; one at
27 subscriber's location and the other at the concentrator location. The
28 concentrator location will have one such low-speed modem for each
29 incoming telephone line. A digital processing circuit converts the digital
30 signals between the low-speed modems of the concentrator and a time
31 multiplexed, high-speed, serial, digital pulse train that is applied to and
- 52 -
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