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| Patents for Ralph A. Durland | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,236,826 | Aug. 14, 1917 | R.A. Durland | Valve Spring Compressor | |
 | RE14,640 | Apr. 29, 1919 | R.A. Durland | Valve Spring Compressor | |