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| Patents for Walter L. Diffenderfer | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,654,686 | Apr. 11, 1972 | W.L. Diffenderfer, F.R. McFarland | Clamping Tool | valve tappet removers | |
| 3,660,905 | May 09, 1972 | W.L. Diffenderfer, F.R. McFarland | Disc Brake Lining Thickness Gauge | automotive tools | |