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Grote; Stanley G. Patents |
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Assignee: Grote; Stanley G.
Address: La Mesa, CA
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4025922 |
Traffic control system |
May 24, 1977 |
| A traffic control system particularly suitable for aiding the blind includes an interrogating FM radio transmitter-receiving unit, which can be incorporated into a cane or the like, and a responding FM radio receiver-transmitter unit operatively associated with the traffic signal lig | |
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