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| All Patents in class 250/227.11 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,441,021 | Apr. 03, 1984 | T.P. Becker, C.B. Stout, D.D. Grover, J.A. Thompson, G.E. Olson | Luminosity Probe for Diesel Engine Timing Apparatus | ||
| 4,767,175 | Aug. 30, 1988 | H. Gähr, C. Böhner, G. Wohlhaupter | Rotary device for transmitting light signals including annular photoelectric transducers | ||