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| Patent ID | Title | Date Filed |
| 6053028 | Method and apparatus for testing transducer horn assembly for testing transducer horn assembly debubbling devices
| January 28, 1999 |
| 5991234 | Ultrasonic sensor system and method having automatic excitation frequency adjustment
| June 11, 1998 |
| 5986972 | Beam pattern shaping for transmitter array
| March 31, 1998 |
| 5946271 | Calibration system for use in time lapse tomography
| March 21, 1997 |
| 5883856 | Power switching method for marine seismic acquisition systems
| October 31, 1997 |
| 5828625 | Echo simulator for active sonar
| October 9, 1997 |
| 5808965 | Laboratory test method to measure towed array hydrophone response
| May 23, 1997 |
| 5798981 | Integrity assessment of ground anchorages
| October 4, 1996 |
| 5790471 | Water/sediment interface monitoring system using frequency-molulated continuous wave
| November 6, 1997 |
| 5784338 | Time domain reflectometry system for real-time bridge scour detection and monitoring
| September 15, 1997 |
| 5777550 | High reliability instrument system
| January 3, 1997 |
| 5774690 | Method for optimization of element placement in a thinned array
| September 14, 1995 |
| 5774415 | Geophone normalization process
| December 6, 1996 |
| 5757721 | Inverse method to measure the breathing wave speed in a liquid-filled cylindrical shell
| March 21, 1997 |
| 5757720 | Processing method for calibrating a hydrophone-geophone sensor pair, and a seismic prospecting method implementing the processing
| January 22, 1997 |
| 5756875 | Thin film phantoms and phantom systems
| April 14, 1995 |
| 5745435 | Method of testing an acoustic array antenna
| February 10, 1997 |
| 5724305 | Apparatus for acoustic near field scanning using conformal arrayal
| June 30, 1995 |
| 5712828 | Hydrophone group sensitivity tester
| August 20, 1996 |
| 5712805 | Noise diagnostic system
| February 16, 1996 |
| 5660909 | Sheet for measuring ultrasonic waves
| September 19, 1995 |
| 5654937 | Acoustic element tester for an array of hydrophones
| March 22, 1996 |
| 5648936 | Method for acoustic near field scanning using conformal arrayal
| June 30, 1995 |
| 5642445 | System for determining an interior or exterior acoustic noise level of an enclosed structure and noise reduction device incorporating such system
| October 31, 1995 |
| 5642331 | Constant radius acoustic sensor mounting system
| February 2, 1996 |
| 5623455 | Apparatus and method for acquiring seismic data
| May 25, 1995 |
| 5617371 | Method and apparatus for accurately determing the location of signal transducers in a passive sonar or other transducer array system
| February 8, 1995 |
| 5594705 | Acoustic transformer with non-piezoelectric core
| February 4, 1994 |
| 5567863 | Intensity acoustic calibrator
| May 15, 1995 |
| 5563848 | Object detector for detecting buried objects
| September 8, 1994 |
| 5535176 | Method and system for sensing with an active acoustic array
| June 28, 1993 |
| 5532974 | Beam pattern measuring apparatus for side-scanning sonars
| June 9, 1995 |
| 5532973 | Resolving power target for side-scanning sonars
| June 9, 1995 |
| 5530678 | Real-time calibration acoustic array
| December 5, 1994 |
| 5524099 | Intrusion detector operating mode selection system
| May 25, 1994 |
| 5517463 | Method of determining optimal seismic multistreamer spacing
| October 21, 1994 |
| 5510701 | Inactive state termination tester
| November 3, 1994 |
| 5504714 | Acoustic and environmental monitoring system
| February 24, 1995 |
| 5485432 | Method of measuring the acoustic backscatter property of the floor of bodies of water
| December 22, 1994 |
| 5477504 | Balanced, double-sided calibration circuit for sensor element and differential preamplifier
| October 7, 1994 |
| 5473578 | Sonar and calibration utilizing non-linear acoustic reradiation
| March 14, 1994 |
| 5465042 | Inactive state termination tester
| August 4, 1994 |
| 5463593 | Apparatus for quantitative measurements of ultrasonic wave power distribution
| March 14, 1994 |
| 5440914 | Method of measuring distribution and intensity of ultrasonic waves
| July 20, 1994 |
| 5412616 | Safety monitoring and control system
| September 3, 1993 |
| 5408440 | Hydrophone circuit with electrical characteristics of a geophone
| March 19, 1993 |
| 5402669 | Sensor matching through source modeling and output compensation
| May 16, 1994 |
| 5400297 | Method and a system for testing capacitive, acoustic transducers
| November 30, 1993 |
| 5396598 | Event-driven signal processor interface having multiple paralleled microprocessor-controlled data processors for accurately receiving, timing and serially retransmitting asynchronous data with quickly variable data rates
| May 7, 1993 |
| 5381383 | Sonar transducer calibration apparatus and method
| December 2, 1993 |
| 5373482 | Distance measuring system arranged to limit false indications of distance measurements
| February 3, 1993 |
| 5363688 | Method of calibrating motion detectors within a scaled environment
| August 12, 1993 |
| 5355350 | Passive acoustic tornado detector and detection method
| May 24, 1993 |
| 5327771 | Loading probe for use in testing transducers
| June 25, 1992 |
| 5325703 | Method for identifying the concentration of fuels or gases
| September 24, 1992 |
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