Inventor

CROFT III JAMES J

US42 patents

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

CROFT III JAMES J

AMERICAN TECH CORP

Acoustically asymmetric bandpass loudspeaker with multiple acoustic filters

Method and device for developing a virtual speaker distant from the sound source

Modulator processing for a parametric speaker system

Parametric virtual speaker and surround-sound system

Paper structures for speaker transducers

Modulator processing for a parametric speaker system

Electroacoustic transducer with diaphragm securing structure and method

Parametric audio system for operation in a saturated air medium

Method of adjusting linear parameters of a parametric ultrasonic signal to reduce non-linearities in decoupled audio output waves and system including same

Parametric virtual speaker and surround-sound system

Bandpass woofer enclosure with multiple acoustic fibers

Loudspeaker system

Sonic emitter with foam stator

Electrostatic transducer with nonplanar configured diaphragm

Electrostatic speaker with foam stator

Electrostatic speaker with moveable diaphragm edges

Bandpass loudspeaker system

System for playback of pre-encoded signals through a parametric loudspeaker system

Dynamic carrier system for parametric arrays

Parametric loudspeaker with improved phase characteristics

Modulator processing for a parametric speaker system

Piezoelectric film sonic emitter

Power amplification for parametric loudspeakers

Single-ended planar-magnetic speaker

Planar-magnetic speakers with secondary magnetic structure

Signal derived bias supply for electrostatic loudspeakers

Dynamic power sharing in a multi-channel sound system

Horn array emitter

Electrostatic loudspeaker with a distributed filter

Signal derived bias supply for electrostatic loudspeakers

Parametric ring emitter

Directional acoustic device

CROFT III JAMES J

Loudspeaker enclosure system with signal processor for enhanced perception of low frequency output

Dynamic power sharing in a multi-channel sound system

Variable directivity loud hailing device

Signal processor for loudspeaker systems for enhanced perception of lower frequency output

Planar-magnetic transducer with improved electro-magnetic circuit

CARVER CORP

Audio frequency power amplifiers

NORRIS ELWOOD G

Parametric loudspeaker with improved phase characteristics

NORTH VAUGHN W

Apparatus for converting ocean wave motion to electricity

LIU WENSEN

Audio distortion correction for a parametric reproduction system

DOLBY LABORATORIES LICENSING CORP

Multi-driver loudspeaker with cross-coupled dual wave-columns