This application is a continuation application of U.S. patent application Ser. No. 09/802,281, titled Hand-Held Sound Source Gun for Infrared Imaging of Sub-Surface Defects in Materials, filed Mar. 8, 2001, now U.S. Pat. No. 6,593,574 which is a continuation-in-part application of U.S. patent application Ser. No. 09/397,585, titled Infrared Imaging of Ultrasonically Excited Subsurface Defects in Materials, filed Sep. 16, 1999, now U.S. Pat. No. 6,236,049 issued May 22, 2001.
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Number | Date | Country | |
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Parent | 09/802281 | Mar 2001 | US |
Child | 10/453081 | US |
Number | Date | Country | |
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Parent | 09/397585 | Sep 1999 | US |
Child | 09/802281 | US |