LandOfFree - US Patents - Listing for Communications, electrical: acoustic wave systems and devices,Echo systems,Distance or direction finding

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

Object detecting switch device

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

Object detecting system using ultrasonic waves

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

Object detecting system using ultrasonic waves

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

Object detection apparatus and method

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

Object detector for detecting buried objects

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

Object indicator for moving vehicles

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

Object measuring and weighing apparatus and method for...

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

Obstacle detection apparatus

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

Obstacle detection device and method for estimating...

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

Obstacle detection system

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

Obstacle sensor having supersonic sensor

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

Oil heating tank meter for monitoring a plurality of variables

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

Omnidirectional distance measurement system

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

Optical correlator and method of using same

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

Optical pickup device

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

Orientation aid for the blind and the visually disabled