Wreford v. Mackworth G. Rees, Inc.

PICARD, District Judge.

Plaintiffs bring action for infringement of patent of a split cylindrical type welding cable head used to carry current from welding transformers to welding guns. The claims involved are 7 to 10 inclusive, applicable to the cable head. Admittedly, the accused cable head has been made and sold by defendant since April 18, 1950; notice of infringement received two days later.

The issues to be decided by this court are:

1. Whether defendant’s cable head infringes plaintiffs’ patent; and

2. Validity of plaintiffs’ patent.

Statement of Facts

Spot welding of sheet metal parts is…