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| All Patents of Type: connecting rod and pin maintenance | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,547,279 | Jul. 28, 1925 | K.R. Wilson | Jig for the alignment of pistons and piston connecting rods | automotive tools | |
| 1,959,891 | May 22, 1934 | H.W. Zimmerman | Bearing hone | automotive tools | |
| 2,013,374 | Sep. 03, 1935 | H.W. Zimmerman | Connecting rod alignment gauge | automotive tools | |
| 2,129,485 | Sep. 06, 1938 | H.W. Zimmerman | Boring machine | boring and turning machines | |