P

Inventor

HARA ELMER H

CA13 patents
⚠️ This page may combine multiple inventors who share the name “HARA ELMER H”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CANADIAN PATENTS DEV

3 patents
US4707064ANov 17, 1987

Optical mixing/demixing device

CANADIAN PATENTS DEV103 citations95
US4369371AJan 18, 1983

Broadband high speed optoelectronic semiconductor switch

CANADIAN PATENTS DEV23 citations78
US4286171AAug 25, 1981

Optoelectric cross-point switch

CANADIAN PATENTS DEV12 citations72

UNITED KINGDOM GOVERNMENT

3 patents
US4232385ANov 4, 1980

Frequency division multiplexing system for optical transmission of broadband signals

UNITED KINGDOM GOVERNMENT34 citations92
US4686533AAug 11, 1987

Optoelectronically switched phase shifter for radar and satellite phased array antennas

UNITED KINGDOM GOVERNMENT34 citations88
US4506151AMar 19, 1985

Optoelectronic logic

UNITED KINGDOM GOVERNMENT21 citations77

(unassigned)

3 patents
US6230139B1May 8, 2001

Tactile and visual hearing aids utilizing sonogram pattern recognition

8 citations67
US6351732B2Feb 26, 2002

Tactile and visual hearing aids utilizing sonogram pattern

4 citations56
US5392077AFeb 21, 1995

Projection TV light controller

0 citations51

US ARMY

1 patent
US4195931AApr 1, 1980

Clear air turbulence detector

US ARMY112 citations95

CANADA MINISTER DEFENCE

1 patent
US4193662AMar 18, 1980

Broadband switching system utilizing optical fiber waveguides

CANADA MINISTER DEFENCE55 citations95

HARA ELMER H

1 patent
US8640527B2Feb 4, 2014

Pipeline leakage-sensing device

HARA ELMER H10 citations79

NIPPON TELEGRAPH & TELEPHONE

1 patent
US4368385AJan 11, 1983

Optoelectronic switches

NIPPON TELEGRAPH & TELEPHONE24 citations78