Inventor
PEIFFER JOHN C
US13 patents
⚠️ This page may combine multiple inventors who share the name “PEIFFER JOHN C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIELSEN CO US LLC
5 patentsUS7742737B2Jun 22, 2010
Methods and apparatus for identifying a digital audio signal
NIELSEN CO US LLC26 citations92
US9686031B2Jun 20, 2017
Methods and apparatus to detect a state of media presentation devices
NIELSEN CO US LLC7 citations83
US9191581B2Nov 17, 2015
Methods and apparatus for mixing compressed digital bit streams
NIELSEN CO US LLC8 citations83
US9305560B2Apr 5, 2016
Methods, apparatus and articles of manufacture to perform audio watermark decoding
NIELSEN CO US LLC1 citations52
US7911347B2Mar 22, 2011
Protective guards for mounting an identification tag on a shopping carrier
NIELSEN CO US LLC1 citations45