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| All Patents in class 29/227 | |||||
| Number | Date | Patentee | Title | Type | |
| 471,436 | Mar. 22, 1892 | W.H. Robinson | Clamp | clamps | |
| 1,050,746 | Jan. 14, 1913 | B. Morgan | Hand Tool | valve spring tools | |
| 1,603,818 | Oct. 19, 1926 | N. Sulentic | Spring Receiving and Manipulating Clip | ||
| 2,264,391 | Dec. 02, 1941 | J.M. MacLeod | Spring Applying and Removing Implement | brake adjusting tools | |
| 4,502,664 | Mar. 05, 1985 | R.R. Zuzinec, Sr., R.B. Bendickson | MacPherson Spring Compressor | ||