Petroleum Anchor Equipment, Inc. v. Tyra

CLAUDE WILLIAMS, Justice.

Action by Petroleum Anchor Equipment, Inc., against William D. Tyra and wife, Dorothy B. Tyra, seeking equitable relief by way of injunction and cancellation of two written instruments designated as Assignments of Application for Letters Patent covering an invention described as a screw type earth anchor and pipeline saddle, a device utilized in anchoring pipelines laid in marshy terrain. The essential facts and material pleadings are set forth in our original opinion in this case. Petroleum Anchor Equipment, Inc. v. Tyra, Tex.Civ.App., 392 S.W.2d 873. In that opinion…