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| Patents for John H. Leonard | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,172,451 | Mar. 09, 1965 | J.H. Leonard | Combined Wipe and Stretch Forming Machine with Cross Slide on the Stretch Forming Assemblage | metal stretch forming machines | |
| 3,426,570 | Feb. 11, 1969 | J.H. Leonard, C.J. Bath | Stretch Wrapping Fixture and Combination Thereof With Drawing Dies and Press | metal stretch forming machines | |