Reexamination Control No. 90/005,742
Patent 5,253,341
1 that have been specially structured to include display data, control data and
2 program instructions for supporting the applications at the network reception
3 systems, the objects being pre-created, parceled units of information that may be
4 distributed and stored at lower levels in the network[,] e.g., at the reception
5 system, so as to reduce processing demand on the network higher element[s], and
6
7 thereby permit the higher elements to function primarily as elements for
8 maintaining and supplying the database information.
9
10 Id. at col. 2, l. 61 to col. 3, l. 3.
11
12 Referring to Figure 2 of Filepp, an interactive network 10 uses a layered structure
13 including an information layer 100, a switch/file server layer 200 (including file server 205), and
14 a cache/concentrator layer 300. Id. at col. 4, ll. 19-22. This structure maintains active
15 application databases and delivers requested parts of the databases on demand to the plurality of
16 reception systems (RSs) 400 in reception layer 401. Id. at col. 4, ll. 22-25. Each of the
17 cache/concentrator units 302 in cache/ concentrator layer 300 serves a plurality of reception
18 systems 400 units over lines 301. Id. at col. 4, ll. 25-28.
19 Each reception system 400 includes a personal computer 405 having a CPU 410
20 including a microprocessor (e.g., an INTEL X'86 microprocessor), companion RAM and ROM
21 memory and other associated elements, a monitor 412 with screen 414, and a keyboard 424. Id.
22 at col. 4, ll. 44-50.
23 Each reception system 400 is capable of communication with the host system to receive
24 information containing either of two types of data, namely objects and messages. Id. at col. 5, ll.
25 3-6. Objects have a uniform, self-defining format known to the reception system 400 and
26 include data types, such as interpretable programs and presentation data for display at monitor
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