Patents
Sitemap › G01 - Measuring; Testing › G01H - Measurement of mechanical vibrations or ultrasonic, sonic or infrasonic waves › G01H 15 - Measuring mechanical or acoustic impedance
Patents for G01H 15 - Measuring mechanical or acoustic impedance (236)
01/2002
01/31/2002US20020013536 Method and apparatus for respiratory gas analysis employing measurement of expired gas mass
12/2001
12/18/2001US6330831 Stream-cleaned differential reflection coefficient sensor
10/2001
10/17/2001EP0764003B1 System and method for measuring acoustic reflectance
10/09/2001US6298726 Acoustic impedance measuring apparatus using ultrasonic waves
08/2001
08/21/2001US6277645 Method and apparatus for respiratory gas analysis employing measurement of expired gas mass
07/2001
07/12/2001WO2000023773A9 Stream-cleaned differential reflection coefficient sensor
05/2001
05/30/2001EP1102564A1 Method and apparatus for respiratory gas analysis employing measurement of expired gas mass
02/2001
02/20/2001US6189366 Method for evaluating transducer horn assembly used in debubbling by comparing frequency dependent impedance to model
02/20/2001CA2201215C Well collar identification method
12/2000
12/19/2000US6161418 Apparatus for testing transducer horn assembly debubbling devices
10/2000
10/31/2000US6139507 Method and apparatus for measuring acoustic power flow within an ear canal
10/12/2000WO2000023773A8 Stream-cleaned differential reflection coefficient sensor
10/04/2000EP1040251A1 Method to determine self-calibrated circumferential cased bond impedance
09/2000
09/05/2000US6112572 Method for testing transducer horn assembly used in debubbling by monitoring operating frequency via impedance trace
08/2000
08/29/2000US6109112 Acoustic landmine prodding instrument with force feedback
08/29/2000US6109092 Method for testing transducer horn Assembly used in debubbling by monitoring operating frequency
08/24/2000WO2000023773A3 Stream-cleaned differential reflection coefficient sensor
08/22/2000US6105443 Dummy sound absorber representing a seated human for measuring sound absorption power of a theater chair
04/2000
04/27/2000WO2000023773A2 Stream-cleaned differential reflection coefficient sensor
04/25/2000US6053028 Method and apparatus for testing transducer horn assembly for testing transducer horn assembly debubbling devices
03/2000
03/28/2000US6041861 Method to determine self-calibrated circumferential cased bond impedance
02/2000
02/23/2000EP0877921A4 Soil compaction measurement
02/17/2000WO2000007498A1 Method and apparatus for respiratory gas analysis employing measurement of expired gas mass
02/17/2000CA2338998A1 Method and apparatus for respiratory gas analysis employing measurement of expired gas mass
11/1999
11/24/1999EP0957764A2 System and method for measuring acoustic reflectance
11/23/1999CA2210518C A device and process for generating and measuring the shape of an acoustic reflectance curve of an ear
11/16/1999CA2191442C System and method for measuring acoustic reflectance
07/1999
07/06/1999US5920520 Characteristic discriminating landmine hand proder
06/1999
06/24/1999WO1999031354A1 Method to determine self-calibrated circumferential cased bond impedance
05/1999
05/12/1999EP0680616B1 Method for deriving water bottom reflectivity in dual sensor seismic surveys
04/1999
04/29/1999WO1999021030A1 Acoustic landmine prodding instrument with force feedback
04/16/1999CA2218461A1 Acoustic landmine prodding instrument with force feedback
02/1999
02/09/1999US5868682 Device and process for generating and measuring the shape of an acoustic reflectance curve of an ear
11/1998
11/19/1998DE19737888C1 Complex elasticity or shear modulus evaluation method for thin polymer layer
11/19/1998DE19737880C1 Complex elasticity or shear modulus evaluation method for thin polymer layers
11/18/1998EP0877921A1 Soil compaction measurement
10/1998
10/21/1998EP0871850A1 A device and process for generating and measuring the shape of an acoustic reflectance curve of an ear
08/1998
08/11/1998US5792072 System and method for measuring acoustic reflectance
08/11/1998CA2149405C Method for deriving water bottom reflectivity in dual sensor seismic surveys
06/1998
06/11/1998WO1998025113A1 Characteristic discriminating landmine hand prodder
06/11/1998CA2273225A1 Characteristic discriminating landmine hand prodder
06/02/1998US5758539 Logging method and system for measuring mechanical parameters of the formations crossed through by a borehole
05/1998
05/19/1998US5754494 Characteristic discriminating landmine hand prodder
05/06/1998EP0839585A2 Method and apparatus for testing transducer horn assembly debubbling devices
05/05/1998US5748471 Well collar identification method
04/1998
04/22/1998EP0836670A2 Method and system for logging mechanical parameters of formations crossed through by a borehole
02/1998
02/19/1998WO1998006324A1 Method and apparatus for measuring acoustic power flow within an ear canal
01/1998
01/29/1998DE19629710A1 Method with appliance for investigating mechanical properties of ground for construction industry
01/07/1998CN1169774A A device and process for generating and measuring the shape of acoustic reflectance curve of an ear
12/1997
12/23/1997US5699809 Device and process for generating and measuring the shape of an acoustic reflectance curve of an ear
10/1997
10/28/1997US5680874 Apparatus for measuring tooth mobility
08/1997
08/07/1997WO1997028432A1 Soil compaction measurement
07/1997
07/29/1997US5651371 System and method for measuring acoustic reflectance
07/17/1997WO1997020501A3 System and method for measuring acoustic reflectance
06/1997
06/12/1997WO1997020501A2 System and method for measuring acoustic reflectance
05/1997
05/14/1997EP0755525A4 A data acquisition system and method
03/1997
03/26/1997EP0764003A1 System and method for measuring acoustic reflectance
03/20/1997DE19535846A1 Mass flow of flowing media measuring method by acoustic impedance
02/1997
02/25/1997US5606533 Data acquisition system and method
01/1997
01/29/1997EP0755525A1 A data acquisition system and method
01/14/1997US5594174 System and method for measuring acoustic reflectance
08/1996
08/28/1996EP0680616A4 Method for deriving water bottom reflectivity in dual sensor seismic surveys.
08/01/1996WO1996023293A1 A device and process for generating and measuring the shape of an acoustic reflectance curve of an ear
08/01/1996WO1996023127A1 Method and system for logging mechanical parameters of formations crossed through by a borehole
08/01/1996CA2186402A1 Method and system for logging mechanical parameters of formations crossed through by a borehole
07/1996
07/25/1996DE19535848C1 Fluid acoustic impedance measuring device
07/04/1996DE19504582C1 Required mechanical impedance measuring system for vibration isolation element
06/1996
06/04/1996US5524100 Method for deriving water bottom reflectivity in dual sensor seismic surveys
05/1996
05/09/1996WO1996013702A1 System for real time measurement of impedance spectra or transfer functions of acoustic and mechanical systems
05/01/1996CN1031734C Variable time-base admittance measuring method for pulse excitation and system response
03/1996
03/27/1996EP0702942A1 Apparatus for measuring tooth mobility
12/1995
12/14/1995WO1995033405A1 System and method for measuring acoustic reflectance
11/1995
11/14/1995US5465469 Method for measuring sound absorption power of a theater chair with a dummy representing a human being seated thereon
11/08/1995EP0680616A1 Method for deriving water bottom reflectivity in dual sensor seismic surveys
10/1995
10/26/1995WO1995028654A1 A data acquisition system and method
10/26/1995CA2187511A1 A data acquisition system and method
09/1995
09/19/1995US5451884 Electronic component temperature test system with flat ring revolving carriage
09/13/1995EP0671547A1 Ultrasonic measurement apparatus and method for boreholes
06/1995
06/20/1995USRE34975 Ultrasonic measurement apparatus
03/1995
03/30/1995WO1995008782A1 Method for deriving water bottom reflectivity in dual sensor seismic surveys
03/07/1995US5396472 Method for deriving water bottom reflectivity in dual sensor seismic surveys
01/1995
01/03/1995US5377546 Multi-degree linear liner impedance testing device
11/1994
11/29/1994CA2042649C Ultrasonic measurement apparatus and method
11/15/1994US5365457 In situ dynamic material property measurement system
11/15/1994US5363701 Material characterizing system
10/1994
10/11/1994US5354956 Ultrasonic measurement apparatus
09/1994
09/13/1994US5345825 Material characterizing system
05/1994
05/31/1994US5317111 Ultrasonic measurement apparatus
01/1994
01/05/1994DE4329246A1 Computer-supported measurement of acoustic frequency-dependent reflection characteristics of walls - subtracting quasi-free-field measurement from measurement performed by positioning speaker-microphone assembly in front of wall and sensing sound directly and indirectly from wall and correcting for energy and phase.
05/1993
05/25/1993US5214251 Ultrasonic measurement apparatus and method
04/1993
04/20/1993CA1316589C Method of identification of well damage and downhole irregularities
12/1992
12/23/1992CN1067312A Time base variable conductance analyzing technique with pulse excitation and system response
07/1992
07/14/1992US5130950 Ultrasonic measurement apparatus
01/1992
01/14/1992US5081613 Method of identification of well damage and downhole irregularities
11/1991
11/21/1991EP0457650A2 Ultrasonic measurement apparatus and method for boreholes
10/1991
10/23/1991CN1014464B Apparatus and method for ultrasound detection
08/1991
08/27/1991US5042303 Apparatus for ultrasound detection
11/1990
11/13/1990CA1276282C Method and apparatus for determining flow resistance of fully assembled acoustic liners
10/1990
10/30/1990CA1275724C Method and device for measuring vibrational stresses and velocities of waves propagated within formations surrounding a wellbore
10/24/1990EP0393960A1 Ice detecting apparatus and methods
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