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| All Patents in class 72/143 | |||||
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| Number | Date | Patentee | Title | Type | |
| 562,529 | Jun. 23, 1896 | C.A. Hällgren | Machine for Making Spiral Wire Springs | spring making machines | |
| 2,268,125 | Dec. 30, 1941 | L.W. Nash, G.A. Martin | Coiler | sheet metal | |
| 2,868,268 | Jan. 13, 1959 | V.A. Zaverruha, T.E. Lewis, Jr. | Coil-Forming Machine with Generator Controlled Spindle Postitioning Means | coil forming | |
| 4,205,543 | Jun. 03, 1980 | R.D. Wright | Spring Winder | ||