(12) United States Patent (10) Patent No.: US 9,134,398 B2 Dupray Et Al
USOO9134398B2 (12) United States Patent (10) Patent No.: US 9,134,398 B2 Dupray et al. (45) Date of Patent: Sep. 15, 2015 (54) WIRELESS LOCATION USING NETWORK (56) References Cited CENTRC LOCATION ESTMLATORS U.S. PATENT DOCUMENTS (75) Inventors: Dennis J. Dupray, Golden, CO (US); M Charles L. Karr, Tuscaloosa, AL (US); 3,630,079 A 12/1971 Hughes et al. Sheldon F. Goldberg, Las Vegas, NV 3,646,580 A 2f1972 Fuller et al. (US) (Continued) (73) Assignee: TracBeam LLC, Golden, CO (US) FOREIGN PATENT DOCUMENTS (*) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 EP O1772O3 4f1986 U.S.C. 154(b) by 0 days. EP O346461 12/1989 (21) Appl. No.: 13/323,221 (Continued) (22) Filed: Dec. 12, 2011 OTHER PUBLICATIONS O O Defendants' Motion for Partial Summary Judgment of Invalidity (65) Prior Publication Data Based on Indefiniteness filed in the United States District Court for the Eastern District of Texas, Tyler Division, at Case No. 6: 11-cv US 2012/O190380 A1 Jul. 26, 2012 00096-LED, on Sep. 25, 2012, 22 pages. (Continued) Related U.S. Application Data Primary Examiner — Dao Phan (63) Continuation-in-part of application No. 1 1/739,097, (74) Attorney, Agent, or Firm — Dennis J. Dupray filed on Apr. 24, 2007, which is a continuation of y y application No. 09/194,367, filed as application No. (57) ABSTRACT PCT/US97/15892 on Sep. 8, 1997, now Pat. No. A wireless location system is disclosed- 0 having one or more (Continued) location centers for locating mobile stations (MS) based on, e.g., WIFI, CDMA, AMPS, NAMPS, TDMA, GPRS, and (51) Int.
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