| Patents for B06B 1 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency (14,020) |
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| 02/26/1991 | US4996675 Signal sensor insensitive to static pressure variations |
| 02/26/1991 | US4996674 Double piston acoustic transducer with selectable directivity |
| 02/26/1991 | US4996502 Ultrasonic atomizer circuit having plural oscillators |
| 02/21/1991 | WO1991001814A1 Manufacture of electromechanical resonators which are electrically excited and piloted by the magnetostrictive effect |
| 02/20/1991 | EP0413633A1 Broad-band underwater transmitter |
| 02/19/1991 | US4995013 Directional modular linear hydrophonic antenna |
| 02/19/1991 | US4993098 Apparatus for vibratory cleaning the surface of an article from foreign matter |
| 02/12/1991 | US4992989 Ultrasound probe for medical imaging system |
| 02/12/1991 | US4992692 Ultrasonic |
| 02/06/1991 | EP0411473A2 Ultrasonic generator with a piezoelectric transducer |
| 02/06/1991 | EP0411349A1 Machine for soil compacting |
| 02/06/1991 | EP0411348A1 Method for compacting soil and machine therefor |
| 02/05/1991 | US4991152 Electroacoustic transducer, usable in particular as a source of acoustic waves for submarine applications |
| 02/05/1991 | US4991151 Elastic pulse generator having a desired predetermined wave form |
| 02/05/1991 | US4989455 Vibrator |
| 01/31/1991 | DE3924665A1 Ceramic denture material compaction - by vibrator with adjustable amplitude and frequency |
| 01/29/1991 | US4987733 Machine |
| 01/24/1991 | DE4022089A1 Casting concrete pipes by vibration process - uses cylindrical mould with vibrators mounted inside mould core |
| 01/23/1991 | EP0409462A1 Inertia force generating device |
| 01/23/1991 | EP0409007A2 Ultrasonic layered transducer |
| 01/22/1991 | US4986808 Magnetostrictive transducer |
| 01/22/1991 | CA1279397C Acoustic energy transmitter for borehole logging |
| 01/15/1991 | US4985926 High impedance piezoelectric transducer |
| 01/15/1991 | US4985735 Electric drive with manual doubler |
| 01/15/1991 | CA2020801A1 Inertia force generating device |
| 01/10/1991 | WO1991000153A1 Wide-range ultrasonic transducer |
| 01/09/1991 | EP0406480A2 Vibrator with rotating masses |
| 01/08/1991 | US4984222 Piezoelectric sensor comprising at least one pair of flexible sensitive elements of great length |
| 01/03/1991 | DE3920872A1 Hot bonding thermoplastic material to piezoelectric material - in transducer mfr., by surface fusing thermoplastic material |
| 01/02/1991 | CN1048178A Sharp vibrator |
| 01/01/1991 | US4982386 Underwater acoustic waveguide transducer for deep ocean depths |
| 01/01/1991 | US4981425 Device for ultrasonic atomization of a liquid medium |
| 12/27/1990 | WO1990016087A2 Piezoelectric device with air-filled kerf |
| 12/27/1990 | EP0404154A2 Ultrasonic probe having backing material layer of uneven thickness |
| 12/25/1990 | US4980837 Circuit and method for automatically sweeping through a plurality of siren modes |
| 12/25/1990 | US4979952 Ultrasonic vibration treatment apparatus |
| 12/18/1990 | US4978488 Concrete block molding machine having continuously driven vibrating shaft mechanism which can be programmably vibrated and method of programmably vibrating such machines |
| 12/18/1990 | US4978011 Sorting machine for grained products |
| 12/18/1990 | CA1278088C Piezo-electric device |
| 12/13/1990 | DE3919134A1 Mfg. piezoelectric transducer suitable for underwater use - covering piezoceramic body, having plug bushes connected to electrode surfaces by Litz wires, etc. |
| 12/13/1990 | DE3919133A1 Multi-directional hydrophone with transducers and trimming capacitors - has side lobe level lowered considerably by series capacitors redn. charge sensitivity to wide variations |
| 12/12/1990 | EP0401643A2 Ultrasonic test head |
| 12/12/1990 | EP0401364A1 Ultrasound generator and its use |
| 12/12/1990 | EP0401349A1 Ultrasound generator |
| 12/12/1990 | EP0401240A1 Vibration generator. |
| 12/05/1990 | EP0401027A2 An acoustic transducer |
| 12/05/1990 | EP0400977A1 Ultrasonic systems |
| 12/05/1990 | EP0400510A1 Apparatus with vibrating table for making concrete products |
| 12/05/1990 | EP0400497A1 Device in acoustic transmitters |
| 12/04/1990 | USRE33472 Rod-type multipole source(for) and receiver for acoustic well logging |
| 12/04/1990 | US4975892 Piezoelectric transducer to generate bulk waves |
| 12/04/1990 | US4974494 Knocking device with autocontrol |
| 12/04/1990 | CA1277415C Elastomer membrane enhanced electrostatic transducer |
| 12/02/1990 | CA2017382A1 Acoustic transducer |
| 12/02/1990 | CA2017041A1 Vibrating table installation for the manufacturing of concrete products |
| 12/01/1990 | WO1990015004A1 Electromagnetic vibrator |
| 12/01/1990 | CA2033179A1 Electromagnetic vibrating apparatus |
| 11/29/1990 | WO1990014738A1 Ultrasonic probe and method of producing the same |
| 11/29/1990 | WO1990014655A1 Stringed musical instrument |
| 11/29/1990 | WO1990014170A1 Ultrasonic probe |
| 11/29/1990 | WO1990014169A1 Electromechanical transducer for low frequency vibrations |
| 11/28/1990 | EP0398888A1 Sand vibration and compaction apparatus and method |
| 11/28/1990 | CN1047224A 超声波探头 Ultrasonic probe |
| 11/27/1990 | US4973876 Ultrasonic power supply |
| 11/27/1990 | US4972578 Method of making a cable mounted magnetostrictive line hydrophone |
| 11/27/1990 | CA1277023C Permanent magnet biased magnetostrictive transducer |
| 11/22/1990 | EP0398078A2 Compact piston vibrator |
| 11/22/1990 | EP0397961A2 Graded frequency sensors |
| 11/22/1990 | EP0397959A2 Annular array sensors |
| 11/22/1990 | EP0397958A2 Ultrasonic sensor with starved dilatational modes |
| 11/20/1990 | US4972390 Stack driven flexural disc transducer |
| 11/20/1990 | US4972389 Electroacoustic transducer |
| 11/20/1990 | CA1276666C Ultrasonic atomizing vibratory element having a multi- stepped edged portion |
| 11/20/1990 | CA1276665C Vibrating element for ultrasonic atomization having curved multi-stepped edged portion |
| 11/15/1990 | CA2016583A1 Ultrasonic probe |
| 11/14/1990 | EP0397318A2 Energy source for seismic surveying |
| 11/14/1990 | EP0396854A1 Power pulse generator |
| 11/13/1990 | WO1990013474A1 A method and a system for counteracting marine biologic fouling of a hull or a submerged construction |
| 11/13/1990 | US4970706 Flextensor transducer |
| 11/13/1990 | US4970656 Analog drive for ultrasonic probe with tunable phase angle |
| 11/13/1990 | US4969368 Oscillation generating apparatus |
| 11/13/1990 | CA2057050A1 Method and a system for counteracting marine biologic fouling of a hull or a submerged construction |
| 11/06/1990 | CA1275824C Rate of ascent monitor |
| 11/04/1990 | WO1990013367A1 PVdF/TrFE PIEZOELECTRIC TRANSDUCER |
| 11/04/1990 | CA2034500A1 Pvdf/trfe piezoelectric transducer |
| 11/01/1990 | WO1990012659A1 Electroacoustic converter |
| 11/01/1990 | WO1990012658A1 Process for manufacturing an acoustic sensor with an essentially non-detachable protective layer, and acoustic sensor so obtained |
| 10/31/1990 | EP0394583A2 Surgical operation device |
| 10/30/1990 | US4966131 Ultrasound power generating system with sampled-data frequency control |
| 10/24/1990 | EP0393988A2 Borehole acoustic transmitter |
| 10/24/1990 | EP0393880A2 Seismic pulse generation |
| 10/24/1990 | EP0393492A2 Electromagnetic vibrating system |
| 10/18/1990 | WO1990011840A1 Method and device for acceleration of liquid and bulk materials |
| 10/16/1990 | US4964091 Electroacoustic transducer |
| 10/16/1990 | US4963782 Multifrequency composite ultrasonic transducer system |
| 10/14/1990 | WO1990011931A1 Method and device for removing of sediment from the surface of thim-walled constructions |
| 10/14/1990 | CA2031194A1 Method for removing deposits from surfaces of thin-walled structures and a device for effecting same |
| 10/11/1990 | DE3911498A1 Device for generating an acoustic signal of variable loudness and device for carrying out the method |
| 10/11/1990 | DE3911047A1 Ultrasonic transducer |
| 10/11/1990 | DE3910851A1 Chime circuit |