Inventor
CAMPBELL MATTHEW M
US4 patents
Patents
4 patentsUS11451867B2Sep 20, 2022
Methods and apparatus to monitor digital media
NIELSEN CO US LLC1 citations70
US10880600B2Dec 29, 2020
Methods and apparatus to monitor digital media
NIELSEN CO US LLC2 citations70
US12375760B2Jul 29, 2025
Methods and apparatus to monitor digital media
NIELSEN CO US LLC0 citations59
US11838584B2Dec 5, 2023
Methods and apparatus to monitor digital media
NIELSEN CO US LLC0 citations59