US Patent: 1,434,411
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| Emergency Door-Lock and Utility Instrument
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Patentee:
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| Morris L. Silverstein (exact or similar names) - Boston, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 10, 1921 |
| Granted: |
Nov. 07, 1922 |
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Patent Pictures:
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Morris L. Silverstein patent November 7, 1922 |
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Stan Schulz
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Description: |
| A stamped "hook" shape with edge threads combined with a threaded conical "nut" having the smaller end padded. The functions described in the specifications and / or shown in the drawings include door lock, bottle opener, screwdriver, knife edge, tack puller and wrench. |
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