SIBLEY, Circuit Judge.
Schlumberger Well Surveying Corporation, owner of Patents No. 1,819,923 and No. 1,913,293, which were issued to Conrad Schlumberger on Aug. 18, 1931, and June 6, 1933, on applications filed June 26, 1929, and Jan. 23, 1932, respectively, obtained a decree against Halliburton Oil Well Cementing Company sustaining Claims 1, 2, 3 and 4 of the former patent and Claim 1 of the latter, adjudging infringement, and awarding an accounting. On this appeal...
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