Number | Name | Date | Kind |
---|---|---|---|
4181884 | Shirasaki et al. | Jan 1980 | |
4262526 | Makita et al. | Apr 1981 | |
4833405 | Richards et al. | May 1989 | |
4866381 | Tatsuhiko | Sep 1989 | |
4907178 | Ogawa et al. | Mar 1990 | |
4953531 | Abe | Sep 1990 | |
4972332 | Luebbering et al. | Nov 1990 | |
5070727 | Davis et al. | Dec 1991 | |
5097209 | Santos | Mar 1992 | |
5103668 | Drutel et al. | Apr 1992 | |
5119670 | Whitehorn et al. | Jun 1992 | |
5313159 | Allwine, Jr. | May 1994 |
Entry |
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Lang, "Railroad Car Surveillance" IBM Technical Desclosure Bulletin vol., 4 No. 7 Dec. 1961 p. 32. |