LandOfFree - US Patents - Listing for Communications, electrical: acoustic wave systems and devices

Communications – electrical: acoustic wave systems and devices – Distance or direction finding – By combining or comparing signals

Dual channel delay sensing circuit

Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through well fluids

Dual channel downhole telemetry

Communications – electrical: acoustic wave systems and devices – Distance or direction finding – By combining or comparing signals

Dual channel switch with frequency band limiting

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type

Dual frequency sonar transducer assembly

Communications – electrical: acoustic wave systems and devices – Signal transducers – Receivers

Dual gimbal geophone

Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding

Dual mode sonar system

Communications – electrical: acoustic wave systems and devices – Acoustic image conversion – With memory means

Dual mode ultrasonic imager system

Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding

Dual reference surface transducer

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control

Dual reflected energy beam alignment system

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type

Dual response acoustical sensor system

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type

Dual rope vibration isolation module for towed hydrophone stream

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type

Dual shuttle air gun

Communications – electrical: acoustic wave systems and devices – Testing – monitoring – or calibrating

Dual slope compensation apparatus

Communications – electrical: acoustic wave systems and devices – Acoustic image conversion – With memory means

Dual unit eidetic topographer

Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With towing

Dual zero velocity towed array system

Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection

Dual-band ultrasonic motion detector

Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With beam steering – scanning – or focussing

Dual-frequency receiving array using randomized element position

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type

Dual-frequency sonar system

Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding

Dual-head multibeam sonar apparatus and method for tracking obje