Inventor

SHAGRIN CERIL T

US2 patents

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

NIELSEN MEDIA RES INC

1 patent

US5771307AJun 23, 1998

Audience measurement system and method

NIELSEN MEDIA RES INC556 citations98

NIELSEN A C CO

1 patent

US5550928AAug 27, 1996

Audience measurement system and method

NIELSEN A C CO615 citations98