Drilling Well Control, Inc. v. Dresser Industries, Inc.

FINDINGS OF FACT, CONCLUSIONS OF LAW AND ORDER

SEALS, District Judge.

This is a suit for patent infringement. The patent in suit is United States Letters Patent No. Re. 26,220 (hereafter “Records patent”). Five claims of the patent are in issue; however, plaintiff has not attempted to establish infringement of claim 13. Claims 4, 18, 20 and 21 remain in issue on the complaint of infringement. In its counterclaim, defendant has asserted invalidity of claims 4. 13, 18, 20 and 21.

The invention of the Records patent is directed to a particular method and apparatus for controlling abnormal pressure…