Resources Contact Us Home Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE     Ultrasonic transducer Image Number 10 for United States Patent #4881212. This invention is basically, an ultrasonic transducer that can be configured with good reproducibility, that includes an acoustic impedance matching member that gradually changes the acoustic impedance, and which is characterized byAn acoustic impedance matching member(2) configured with multiple unit layers (21, 22, 23, . . . 2n), each layer being thinner than a quarter-wavelength of an ultrasonic wave, andeach unit layer having a laiminated structure make up of heavy metal(52) and plastic(51) layers with a thickness ratio set between them to change gradually from the unit layer close to the ultrasonic oscillator to the unit layer close to the subject.       Recently Added Patents Method and system for controlling context-based wireless access to secured network resources Method and device for automatically detecting a lateral dissymetry of an aircraft Integrated circuit interconnect structure Temperature-robust MEMS gyroscope with 2-DOF sense-mode addressing the tradeoff between bandwith and gain PCI-E extended reach with receive detect circuitry Digital camera Mobile station for cell selection and detecting radio link failure   Randomly Featured Patents Anchor with an improved upper structure and method for manufacturing the same Nuclear cardiology apparatus and method Ferroelectric based capacitor for use in memory systems and method for fabricating the same Breaker interlock system and method Arrangement for supplying a medium into an exhaust gas conduit in an internal combustion engine Heat pipe heat exchanger Secure implementation and utilization of device-specific security data Molded case circuit breaker with handle lock Door on drum type washing machine or laundry dryer Cement retarder systems, and retarded cement compositions © 2006-2008 PatentGenius. All Rights Reserved.