US Patent: 1,542,336
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| Wrench Thi
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Patentee:
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| August Edwin Carlberg (exact or similar names) - Worcester, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 23, 1922 |
| Granted: |
Jun. 16, 1925 |
| Reissue Information: |
| Reissued as RE16,354 (May 18, 1926) |
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Patent Pictures:
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A. E. Carlberg patent June 16, 1925 |
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Stan Schulz
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Description: |
| The primary focus is the pivoting arrangement for socket wrenches. This patent is in the same time frame as Walden-Worcester's #774 (5/8" hex) & #775 (9/16" square) swivel head sockets. Patent no. 1,613,976 is another swivel socket patent used by Walden-Worcester.
Moses, Hammond, Morse & Nolte - patent attorneys
Improved upon with patent #1,796,083
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