P

Inventor

KIEWIT DAVID A

US9 patents
⚠️ This page may combine multiple inventors who share the name “KIEWIT DAVID A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NIELSEN A C CO

5 patents
US5331544AJul 19, 1994

Market research method and system for collecting retail store and shopper market research data

NIELSEN A C CO443 citations99
US4930011AMay 29, 1990

Method and apparatus for identifying individual members of a marketing and viewing audience

NIELSEN A C CO427 citations98
US4876736AOct 24, 1989

Method and apparatus for determining channel reception of a receiver

NIELSEN A C CO336 citations98
US4697209ASep 29, 1987

Methods and apparatus for automatically identifying programs viewed or recorded

NIELSEN A C CO929 citations98
US4644509AFeb 17, 1987

Ultrasonic audience measurement system and method

NIELSEN A C CO158 citations98

NIELSEN MEDIA RES INC

1 patent
US5737025AApr 7, 1998

Co-channel transmission of program signals and ancillary signals

NIELSEN MEDIA RES INC261 citations97

GOULD INC

1 patent
US4107626AAug 15, 1978

Digital output force sensor using surface acoustic waves

GOULD INC33 citations92

(unassigned)

1 patent
US5662345ASep 2, 1997

Wheelchair wheel cambering apparatus

21 citations91

KIEWIT DAVID A

1 patent
US5040409AAug 20, 1991

Sprinkler alarm

KIEWIT DAVID A51 citations89