Wood Conversion Co. v. Armstrong Cork Co.

*379MEMORANDUM DECISION

NORDBYE, District Judge.

This proceeding is a declaratory-judgment action brought by the plaintiff against the defendant to have United States Letters Patent D-188,491 for the design of a “Ceiling Tile Or The Like” declared invalid and not infringed. The defendant is the owner of the patent in suit and has counterclaimed to have the patent declared valid and infringed by the plaintiff.

Plaintiff is a corporation of the State of Delaware with its principal place of business in St. Paul, Minnesota. Defendant is a Pennsylvania corporation with its principal place of business at…