At Patents you can conduct a Patent Search, File a Patent Application, find a Patent Attorney, or search available technology through our Patent Exchange. Patents are available using simple keyword or date criteria. If you are looking to hire a patent attorney, you've come to the right place. Protect your idea and hire a patent lawyer.
United States Patent | 4,912,471 |
Tyburski , et al. | March 27, 1990 |
An interrogator-responder communication system in which responders are carried by vehicles (such as railroad vehicles) travelling along a route and in which an interrogating station situated along the route operates each passing responder to recall data from a memory in the passing responder. In one embodiment, the responder is equipped to receive data transmitted from a transmit station and to store the received data, for later recall, in a non-volatile, electrically erasable read/write memory.
Inventors: | Tyburski; Robert M. (Fairfax, VA), Shillady; Robert W. (North Wales, PA) |
Assignee: |
Mitron Systems Corporation
(Columbia,
MD)
|
Appl. No.: | 06/548,316 |
Filed: | November 3, 1983 |
Current U.S. Class: | 340/10.34 ; 340/10.51; 340/505; 340/935; 340/941; 342/44; 342/51; 455/41.1; 455/523 |
Current International Class: | B61L 25/00 (20060101); B61L 25/04 (20060101); G01S 13/00 (20060101); G01S 13/75 (20060101); G01S 013/76 (); G01S 013/80 (); G01S 013/86 () |
Field of Search: | 343/6.5SS,6.5LC,6.5R,6.8R,6.8LC 364/424,424.01,424.03,424.04,424.05,424.11-426.05 455/41,49,54 342/42-45,50,51 340/47,52R,52F,298,311.1,505,696,825.44,825.54,825.55,825.83,825.86,933,935 246/7,8,13,29R,30,44,62,63R,11R,122R,124,169D,178,187R,193,194 |
3090042 | May 1963 | Kleist et al. |
3270338 | August 1966 | Watters |
3713148 | January 1973 | Cardullo et al. |
3839717 | October 1974 | Paul |
3859624 | January 1975 | Kriofsky et al. |
3927389 | December 1975 | Neeloff |
3944928 | March 1976 | Augenblick |
3984835 | October 1976 | Kaplan et al. |
4038653 | July 1977 | Brewster |
4075632 | February 1978 | Baldwin et al. |
4114151 | September 1978 | Denne et al. |
4159531 | June 1979 | McGrath |
4242661 | December 1980 | Henoch |
4313118 | January 1982 | Calvin |
4390880 | June 1983 | Henoch |
4550444 | October 1985 | Uebel |
2926806 | Jan., 1981 | DE | |||
2260115 | Aug., 1975 | FR | |||
0138447 | Aug., 1982 | JP | |||
5927278 | Feb., 1983 | JP | |||
0189467 | Oct., 1984 | JP | |||
2103408 | Feb., 1983 | GB | |||
P Lorrain et al., EM Fields and Waves; Appendix A, (1970). . R. Graf, Dict. of Electronics; p. 386, (1974). . J. Lenk, Handbook of Microprocessors, Microcomputers and Minicomputers; p. 51 (1979). . Encyclo. of Science and Technology; vol. 8, pp. 644-647 (1982). . "Short-Range Radio-Telemetry for Electronic Identification Using Modulated RF Backscatter", by A. Koelle et al. (Proc. of IEEE, 8/75; pp. 1260-1261). . "IBM Technical Disclosure Bulletin", (vol. 20, No. 7; 12/77), pp. 2525-2526. . "IEEE Transactions on Vehicular Technology", (vol. VT-26, No. 1), 2/77; p. 35.. |