THOMSON, District Judge.
While suit was brought on three patents, the Bassett patent is the only one before us. This patent relates to signal systems for elevators. It is of the type where the passenger, on entering the car, announces his destination to the operator, who then presses the appropriate button of an annunciator on the car. When the car approaches the floor announced, a signal is automatically displayed in the car, reminding the operator that he is expected...
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