US Patent No: 4,743,870

Number of patents in Portfolio can not be more than 2000

Longitudinal mode fiber acoustic waveguide with solid core and solid cladding

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Abstract

An elastic waveguide, for propagating acoustic waves, consists of an elongated solid core region and an elongated solid outer cladding region. The acoustic waves propagate in a mode where the principle particle displacement is substantially parallel to the longitudinal axis of the waveguide, this mode is called longitudinal mode. The material densities and the bulk shear wave velocities of the core and cladding region are substantially the same but the bulk longitudinal wave velocity of the cladding region is larger than that of the core region.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NATIONAL RESEARCH COUNCIL OF CANADAOTTAWA ONTARIO857

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bussiere, Jean F 1000 Des Tilleuls, #4, St. Bruno, Quebec, CA 7 84
Farnell, Gerald W Montreal, CA 3 37
Jen, Cheng K Brossard, CA 2 26
Safaai-Jazi, Ahmad Blacksburg, VA 7 72

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Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
HORIBA, LTD. (3)
7,062,972 Acoustic transducer 2 2003
7,021,145 Acoustic transducer 0 2003
7,124,621 Acoustic flowmeter calibration method 0 2004
 
NATIONAL RESEARCH COUNCIL OF CANADA (3)
4,894,806 Ultrasonic imaging system using bundle of acoustic waveguides 10 1987
5,241,287 Acoustic waveguides having a varying velocity distribution with reduced trailing echoes 8 1991
5,828,274 Clad ultrasonic waveguides with reduced trailing echoes 8 1996
 
QUALCOMM INCORPORATED (3)
7,745,521 Acoustic waveguide plate 0 2007
7,745,522 Acoustic waveguide plate with nonsolid cores 0 2008
8,119,709 Acoustic waveguide array 0 2009
 
UNIVERSITY OF WASHINGTON (3)
6,217,530 Ultrasonic applicator for medical applications 49 1999
6,500,133 Apparatus and method for producing high intensity focused ultrasonic energy for medical applications 41 2000
6,666,835 Self-cooled ultrasonic applicator for medical applications 23 2002
 
HEWLETT-PACKARD COMPANY (2)
5,217,018 Acoustic transmission through cladded core waveguide 18 1989
5,400,788 Apparatus that generates acoustic signals at discrete multiple frequencies and that couples acoustic signals into a cladded-core acoustic waveguide 40 1993
 
LOCKHEED MARTIN CORPORATION (1)
4,929,050 Traveling wave fiber optic interferometric sensor and method of polarization poling fiber optic 21 1988
 
Novax Industries Corporation (1)
5,606,297 Conical ultrasound waveguide 16 1996