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Richard Waddell Patents |
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Inventor: Waddell; Richard
Address: Almonte, Ontario, CA
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 5235933 |
Indicator device |
August 17, 1993 |
| There is described an improved device for indicating the status of a room or adjoining space, the device including first and second plates hingedly connected to one another along adjacent edges thereof, a spring urging the second plate into a normally closed position overlying and parall |
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