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| Patents for Alvin J. Schmidt | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-973,447 | Aug. 26, 1975 | A.J. Schmidt | Pilot valve | pressure regulators | |
| GB-1,411,921 | Oct. 29, 1975 | A.J. Schmidt | Pilot valve | pressure regulators | |