| Patents for H03H 9 - Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators (20,116) |
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| 12/17/1991 | US5073807 Method and apparatus for achieving multiple acoustic charge transport device input contacts |
| 12/17/1991 | US5073763 Group single-phase unidirectional transducers with 3/8λand 5/8λ sampling |
| 12/12/1991 | WO1991019352A1 Ultra thin quartz crystal filter element of multiple mode |
| 12/12/1991 | WO1991019351A1 Structure of electrode and lead thereof of ultra thin plate piezoelectric resonator |
| 12/11/1991 | EP0460559A2 Radial terminals type electronic component to insert in a printed circuit board |
| 12/04/1991 | EP0459631A2 At-cut crystal oscillating element and method of making the same |
| 12/04/1991 | CN1015041B Surface acoustic wave device |
| 12/03/1991 | US5070472 Convolver optimum bias circuit |
| 12/03/1991 | US5070271 Multi-dimensional acoustic charge transport device |
| 12/03/1991 | CA1292785C Dual mode dielectric resonator filters without iris |
| 11/21/1991 | EP0456709A1 Personalized passive identification device |
| 11/13/1991 | EP0456061A1 Resonator having a bar for oscillating in a longitudinal mode |
| 11/13/1991 | EP0455970A1 Acoustic image signal delay |
| 11/12/1991 | US5065066 Piezoelectric resonator |
| 11/12/1991 | US5065065 Surface acoustic wave device |
| 10/31/1991 | WO1991016763A1 Surface wave low loss filter |
| 10/30/1991 | EP0454288A1 Electrode structure with constant velocity and predetermined reflectivity |
| 10/29/1991 | US5061871 Electrode structure with constant velocity and zero reflectivity |
| 10/29/1991 | US5061870 Surface acoustic wave device |
| 10/22/1991 | US5059853 Longitudinal quartz crystal resonator |
| 10/22/1991 | US5059848 Low-cost saw packaging technique |
| 10/22/1991 | US5059847 Single crystal silicon substrate, piezoelectric thin film of aluminum nitride |
| 10/20/1991 | CA2034392A1 Electrode structure with constant velocity and predetermined reflectivity |
| 10/17/1991 | WO1991015897A1 Surface wave transformer, especially of the split finger type, with the suppression of reflections of terminal transformer fingers |
| 10/16/1991 | EP0452105A2 Saw device having a plurality of electrodes and a fabrication method thereof |
| 10/16/1991 | EP0451992A2 Detection of vibrations of a microbeam through a shell |
| 10/15/1991 | US5057802 Ladder-type electric filter apparatus and housing therefor |
| 10/15/1991 | US5057801 Filter device of piezo-electric type including divided co-planar electrodes |
| 10/09/1991 | EP0451089A1 High frequency piezoelectric resonator |
| 10/09/1991 | EP0450928A2 Saw reflectionless quarterwavelength transducers |
| 10/02/1991 | EP0449721A1 Thermostated piezoelectric resonator, which is insensitive to elimatic variations |
| 10/02/1991 | EP0449473A2 Method for hermetically sealing electronic devices |
| 10/02/1991 | EP0449300A2 Ladder-type electric filter |
| 10/02/1991 | DE4010310A1 Oberflaechenwellenwandler, insbesondere in splitfinger-ausfuehrung, mit unterdrueckung von reflexionen endstaendiger wandlerfinger Oberflaechenwellenwandler, especially in split finger design, with suppression of reflections transformer terminal finger |
| 09/25/1991 | EP0448357A2 Surface-acoustic-wave filter having a plurality of electrodes |
| 09/24/1991 | US5051711 Variable bandwidth crystal filter with varactor diodes |
| 09/24/1991 | US5051709 Saw device tapped delay line and equalizer |
| 09/24/1991 | US5051644 Electrode structure with constant velocity and predetermined reflectivity |
| 09/24/1991 | US5050967 Adaptive notch filter using acousto-optics and photorefraction |
| 09/18/1991 | EP0446489A1 Electronic device and terminal to be provided therefor |
| 09/17/1991 | CA1289206C Monolithic saw filter |
| 09/10/1991 | US5047363 Method and apparatus for reducing heterostructure acoustic charge transport device saw drive power requirements |
| 09/05/1991 | WO1991013492A1 Response correction for saw filters |
| 09/03/1991 | US5045744 Energy-trapping-by-frequency-lowering-type piezoelectric-resonance device |
| 09/03/1991 | US5045743 Surface acoustic wave device |
| 08/27/1991 | US5043620 Surface acoustic wave convolver and convolution integrator using same |
| 08/22/1991 | WO1991012663A1 Structure for holding ultrathin plate piezoelectric resonator in package |
| 08/22/1991 | WO1991012662A1 Structure of ultra-thin sheet piezoresonator |
| 08/20/1991 | US5041754 Crystal resonator with acceleration sensitivity adjustable by external circuit means |
| 08/13/1991 | US5039957 High power surface acoustic wave devices having copper and titanium doped aluminum transducers and long-term frequency stability |
| 08/08/1991 | WO1991011856A1 Surface acoustic wave filter |
| 08/06/1991 | USH952 Method of preparing a quartz surface for sweeping |
| 07/31/1991 | CN1013407B Vibrating type transducer and manufacturing process thereof |
| 07/30/1991 | US5035035 Method of mounting saw devices |
| 07/30/1991 | CA1287190C Correction process for a surface wave device, especially for dispersion filter |
| 07/24/1991 | EP0438124A2 Magnetostatic wave device |
| 07/24/1991 | EP0309567A4 Force sensing vibrating beam resonator |
| 07/24/1991 | EP0222012B1 Resonant sensor and method of making same |
| 07/23/1991 | US5034793 Time delay modulation and correction device |
| 07/23/1991 | US5034753 Acoustically coupled antenna |
| 07/17/1991 | EP0436556A1 Surface wave filter. |
| 07/16/1991 | US5033063 Surface-acoustic-wave device |
| 07/16/1991 | US5032908 High definition television acoustic charge transport filter bank |
| 07/16/1991 | US5032755 Method and means for damping modes of piezoelectric vibrators |
| 07/09/1991 | US5030934 Crystal notch filter comprising discrete quartz crystals coupled to a trimmable RC bridging network |
| 07/09/1991 | US5030933 Noise filter |
| 07/09/1991 | US5030930 Surface-acoustic-wave convolver |
| 07/09/1991 | US5030876 Mounting structure for crystal resonator |
| 07/09/1991 | US5030875 Sacrificial quartz crystal mount |
| 07/09/1991 | CA1286024C Saw device |
| 07/03/1991 | EP0435189A2 Surface acoustic wave device |
| 07/02/1991 | US5028895 Notch filter for reducing clock signal feedthrough effects in an acoustic charge transport device |
| 07/02/1991 | US5028831 SAW reflectionless quarter-wavelength transducers |
| 07/02/1991 | US5028101 Surface-acoustic-wave device and notch filter device having a plurality of diode array channels |
| 06/27/1991 | DE3942148A1 Oberflaechenwellen-reflektorfilter Oberflaechenwellen reflector filter |
| 06/27/1991 | DE3942140A1 Oberflaechenwellen-reflektorfilter Oberflaechenwellen reflector filter |
| 06/21/1991 | WO1991009465A1 Surface wave reflector filter |
| 06/21/1991 | WO1991009464A1 Surface wave reflector filter |
| 06/21/1991 | CA2070681A1 Surface wave reflector filter |
| 06/21/1991 | CA2070675A1 Surface wave reflector filter |
| 06/18/1991 | US5025346 Laterally driven resonant microstructures |
| 06/12/1991 | CN1052196A Surface acoustic wave devices |
| 06/11/1991 | US5023503 Super high frequency oscillator/resonator |
| 06/11/1991 | US5022130 Reducing the gamma vector |
| 06/05/1991 | EP0430652A2 Damped cradle for SAW device |
| 06/04/1991 | US5021699 Interdigital transducer for surface acoustic wave filter |
| 05/29/1991 | CA2027367A1 Damped cradle for saw device |
| 05/28/1991 | US5019742 Saw device with apodized IDT |
| 05/16/1991 | DE3937871A1 Reflector filter for acoustic surface waves - has input converter(s) with main wave propagation device and output converter(s) with such device |
| 05/16/1991 | DE3937870A1 Acousto-electronic component with surface wave substrate - has integrated semiconductor circuit, whose substrate covers surface wave structures |
| 05/15/1991 | WO1991007818A1 Surface-wave reflector-filter |
| 05/15/1991 | CA2068531A1 Surface-wave reflector-filter |
| 05/14/1991 | WO1991007782A1 Inductively coupled saw device and method for making the same |
| 05/14/1991 | WO1991007671A1 Inductive input/output coupling for a surface acoustic wave device |
| 05/08/1991 | DE3937073A1 ATC acousto-electronic component - has piezoelectric substrate of lithium niobate or tantalate for high power |
| 04/30/1991 | US5012151 Thermally matched strip mounted resonator and related mounting method |
| 04/30/1991 | US5011568 Use of sol-gel derived tantalum oxide as a protective coating for etching silicon |
| 04/24/1991 | EP0424240A1 Unidirectional surface wave transducer |
| 04/23/1991 | US5010270 Saw device |
| 04/23/1991 | US5010269 SAW resonator having a broad bandwidth |