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

Marine depth sounding apparatus

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

Marine electronics with lure depth analyzer

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

Marine seismic streamer retrieval system

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

Matched filter, receiving beam-forming apparatus and sonar...

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

Measuring distances using a plurality of frequencies

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

Measuring method and apparatus

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

Measuring method and apparatus

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

Measuring method and apparatus

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

Measuring method and apparatus

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

Mechanical sector scanner head and power train

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

Method and apparatus for acoustically measuring the level of liq

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

Method and apparatus for coherent burst ranging

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

Method and apparatus for determining bedload thickness employing

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

Method and apparatus for determining the length of tubular membe

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

Method and apparatus for eliminating substantially false...

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

Method and apparatus for fixed target echo suppression in distan

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

Method and apparatus for improved active sonar using...

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

Method and apparatus for locating underwater objects

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

Method and apparatus for measurement of length and height of obj