CA Patent: CA-585,901
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| Multi-speed drive
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Patentees:
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| Yih-O Tu (exact or similar names) - Pittsburgh, PA |
| David D. Pettigrew (exact or similar names) - Pittsburgh, PA |
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Patent Dates:
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| Applied: |
Feb. 28, 1955 |
| Granted: |
Oct. 27, 1959 |
CIPO Data
Espacenet patent
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Jeff Joslin
Vintage Machinery entry for Delta Specialty/Delta Mfg. Co./Delta-Rockwell/Rockwell Intl.
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Description: |
| The patent number was listed in a 1965 catalog of machinery from Rockwell Mfg. Co. The patent is the Canadian equivalent of US patent 2,830,628. |
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