Reexamination Control No. 90/005,742
Patent 5,253,341
1 technique that requires more processing capability to compress than to decompress.” Telecom
2 Glossary 2K, http://www.atis.org/tg2k/_asymmetric_compression.html (accessed July 6, 2002).
3 Although the 2002 date of this definition is subsequent to appellant's April 1991 filing date, we
4 of the opinion that both it and Dr. Koopman’s testimony are consistent with the discussion of
5 compression and decompression in the '341 patent disclosure. What the examiner apparently has
6 failed to recognize is that the system disclosed in the ‘341 patent is “asymmetric” in two
7 different respects. The first respect, the only one to which the ‘341 patent applies the term
8 “asymmetric,” concerns the different processing powers of the server and the end user station, a
9 relationship which exists whether or not the responses are in compressed form. Specifically,
10 after explaining that "[i]n operation, the EUS transmits a query to the server for the purpose of
11 initiating a process in the server (e.g. data compression, indexing into a very large database,
12 etc.), via an optional concentrator or requiring the high speed processing, large capacity and
13 multi-distributed data storage, etc. typically included in the server," '341 patent, col. 2, ll. 29-35,
14 the patent characterizes this difference in processing power as “an inherent asymmetry in the
15 overall process in which an EUS queries a remote server (and/or Server Network) for a data
16 service (e.g. retrieval of audio visual data in faster than real time) where most of the processing
17 power resides in the Server." Id. at col. 2, ll. 39-44. The second respect in which the disclosed
18 system is asymmetric is to employ compression and inverse decompression techniques which
the testimony in paragraphs 249-51 and 337-40 about the meaning of "asymmetric" simply by
noting that “the rejections” (presumably the § 112 rejections) have been withdrawn. Answer at
162 and 188.
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