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| Patents Granted on 1955-04-05 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,705,441 | Apr. 05, 1955 | J.O. Armstrong | Hold-Down Clamp | clamps | |
| 2,705,501 | Apr. 05, 1955 | R.C. Fritzsch | Non-repeat valve | sheet metal brakes | |