ABRUZZO, District Judge.
This suit is brought in equity for patent infringement. The plaintiffs claim a patent on an electromechanical interlock for self-service elevators. The lock prevents the hall door, leading from the hall to the elevator car or cab, from being opened until the elevator cab or car is at the floor.
The two patents in suit are numbered 1,945,734 and 2,060,283. The plaintiffs concede that locks functioning in the manner described in his...
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