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US006320933B1
(12) United States Patent ao) Patent No.: us 6,320,933 Bi
Grodzins et al. (45) Date of Patent: Nov. 20,2001
(54) MULTIPLE SCATTER SYSTEM FOR THREAT IDENTIFICATION
(75) Inventors: Lee Grodzins, Lexington, MA (US);
William Adams, Powell, OH (US)
(73) Assignee: American Science and Engineering, Inc., Billerica, MA (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 09/448,721
(22) Filed: Nov. 24, 1999
Related U.S. Application Data
(60) Provisional application No. 60/110,185, filed on Nov. 30, 1998.
(51) Int. C I. C01K 15/02
(52) U.S. CI 378/89; 378/86
(58) Field of Search 378/86, 89
(56) References Cited
U.S. PATENT DOCUMENTS
3,961,186 6/1976 Leunbach 250/272
