Appeal No. 1997-1190
Application No. 08/427,972
specification for a description of how synchronization is
achieved.7
We also note that the specification at page 2 refers to,
inter alia, U.S. Patent No. 4,715,451 (the Bseisu patent) as
teaching a known measuring system. Our review of Bseisu
reveals that it discloses a system for measuring drillstem
loading and behavior, including first and second subs 36 and
38 having mounted thereon various accelerometers and strain
gages (col. 4, lines 20-54). The subs 36 and 38 generate
signals which are transmitted to an above-ground receiver 116.
The receiver 116 may include means for converting the signals
to a form which may be analyzed by a digital computer to
determine particular vibration modes of the drillstem (col. 5,
lines 36-68).
Based on the evidence of record in this case, it appears
that the structure of the electric couplings and subs are well
known to persons of ordinary skill in the art and that
appellants' specification would have been sufficient to enable
a person or persons of ordinary skill in the art to assemble
Pages 13 and 14 disclose that when the surface installation receives a7
signal from the first sub, it sends an acquisition order to the second sub.
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