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Patents for Leroy J. Halverstadt | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 969,618 | Sep. 06, 1910 | L.J. Halverstadt | Guard for woodworking machines | |
![]() | 1,134,738 | Apr. 06, 1915 | L.J. Halverstadt | Guard for woodworking machines |