Reexamination Control No. 90/005,742
Patent 5,253,341
1 screen 414 of the user's personal computer. Id. at col. 5, ll. 6-10. Figure 3b shows an example of
2 a page of data displayed on screen of reception system 400.
3 Since much of the application processing formerly done by a host computer in
4 previously known time-sharing networks is now performed at the user's reception system 400,
5 the higher elements of network 10, particularly layer 200 (including file server 205), have as
6 their primary functions the routing of messages, serving of objects, and line concentration. Id. at
7 col. 6, ll. 29-34.
8 The information received by reception system 400 from interactive network 10 includes a
9 compression descriptor segment, which contains information needed for the decompression of
10 objects which have been compressed by network 10. Id. at col. 15, ll. 35-37. This segment is a
11 formalization of parameters to be used by a decompression routine residing at reception system
12 400, using, for example, the Huffman encoding well known in the art. Id. at ll. 35-40.
13 Filepp explains that "[t]he reception system 400 software is the interface between the
14 user of personal computer 405 and interactive network 10" and that "[t]he object of reception
15 system software is to minimize mainframe processing, minimize transmission across the
16 network, and support application extendibility and portability." Id. at col. 82, ll. 16-21
17 (emphasis added).
18 Filepp does not describe interactive computer network 10 (which performs the mainframe
19 processing) as employing a RISC- or CISC-based processor or as being UNIX-based.
20 (2) Comparing claims 9-11 and 14 to Filepp
21
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