US Patent: 363,321
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| Folding Square
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Patentee:
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| Edward Douglas (exact or similar names) - Cincinnati, Hamilton County, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 11, 1886 |
| Granted: |
May 17, 1887 |
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Joel Havens
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Description: |
| Claim:
In a square, one or more segmental links attached to one arm and operating in corresponding grooves on the other arm, the sides of the segments and grooves being beveled, so as to prevent disengagement, substantially ns shown and described, and for the purposes specified. |
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