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All Patents of Type: spark plug adjusting | |||||
Number | Date | Patentee | Title | Type | |
2,645,142 | Jul. 14, 1953 | O. Schwenzfeler | Spark Plug Adjusting Pliers | spark plug adjusting | |
2,670,643 | Mar. 02, 1954 | W.H. Clark | Spark Gap Adjusting Pliers | spark plug adjusting |