US Patent: 201,749
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| Improvement in sash-pulleys
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Patentees:
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| Edward H. N. Clarkson (exact or similar names) - Baltimore, MD |
| William H. H. Kesler (exact or similar names) - Baltimore, MD |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 23, 1877 |
| Granted: |
Mar. 26, 1878 |
| Reissue Information: |
| Reissued as RE8,586 (Feb. 18, 1879) |
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Jeff Joslin
Vintage Machinery entry for Joseph Clarkson & Son
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Description: |
| This patent is of interest because a mortising machine was developed to produce the mortise required by this pulley; see patent RE9,221. |
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