Inventor

YAMAKAWA TAKEHIKO

JP41 patents

⚠️ This page may combine multiple inventors who share the name “YAMAKAWA TAKEHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

YAMAKAWA TAKEHIKO

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

Piezoelectric resonator, filter, and duplexer

Thin film bulk acoustic resonator, method for producing the same, filter, composite electronic component device, and communication device

Piezoelectric resonator filter

RF device and communication apparatus using the same

Dielectric filter

Piezoelectric resonator, method of manufacturing piezoelectric resonator, and filter, duplexer, and communication device using piezoelectric resonator

Filter using piezoelectric resonator

Piezoelectric device, antenna duplexer, and method of manufacturing piezoelectric resonators used therefor

Piezoelectric resonator, production method thereof, filter, duplexer, and communication device

Dielectric resonator, dielectric filter, and method of supporting dielectric resonance element

Piezoelectric resonator and method for producing the same

Multilayer electronic component and communication apparatus and method

In-band-flat-group-delay type dielectric filter and linearized amplifier using the same

In-band-flat-group-delay type dielectric filter and linearized amplifier using the same

In-band-flat-group-delay type dielectric filter and linearized amplifier using the same

PANASONIC CORP

Piezoelectric resonator, piezoelectric filter, and duplexer and communication device using the same

Frequency-variable acoustic thin film resonator, filter and communication apparatus using the same

Film bulk acoustic wave resonator and method for manufacturing the same

Device including piezoelectric thin film and a support having a vertical cross-section with a curvature

Filter using piezoelectric resonator

Micromachine switch, filter circuit, duplexer circuit, and communication device

Piezoelectric resonator having a spurious component control layer, filter using the piezoelectric resonator, and duplexer using the piezoelectric resonator

Piezoelectric filter, antenna duplexer, and communications apparatus employing piezoelectric resonator

Dual mode piezoelectric filter, method of manufacturing the same, high frequency circuit component and communication device using the same

Piezoelectric resonator, method of manufacturing piezoelectric resonator, and filter, duplexer, and communication device using piezoelectric resonator

Vibration power generator

PANASONIC IP MAN CO LTD

Resonant power converter

Magnetic device including winding and insulators, and power conversion device using the same

Transformer including first and second windings, and first and second cores, and having structure for preventing core cracking

Electromagnetic relay

Coil structure, transformer, and power converter

Power converter apparatus converting input power having a predetermined voltage into output power having a predetermined output voltage over wide range with higher efficiency

Electromagnetic relay and control method thereof

Equations for an LLC converter having increased power output capabilities

Magnetic component and power transfer device

YAMAKAWA TAKEHIKO

Oscillator with MEMS resonator

High-frequency filter

Filter device having attenuation poles

Oscillator

NAKAMURA KUNIHIKO

MEMS pressure sensor

KAMIYAMA TOMOHIDE

Resonator and production method thereof