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| Patents for Harold Gähr | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 4,328,722 | May 11, 1982 | H. Gähr, G. Wohlhaupter | Apparatus for facing and internal turning | |
 | 4,741,230 | May 03, 1988 | G. Wohlhaupter, H. Gähr, C. Böhner | Apparatus for facing and internal turning | |
 | 4,767,175 | Aug. 30, 1988 | G. Wohlhaupter, H. Gähr, C. Böhner | Rotary device for transmitting light signals including annular photoelectric transducers | |