Inventor
PARKIN DEREK A
GB5 patents
⚠️ This page may combine multiple inventors who share the name “PARKIN DEREK A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
3M INNOVATIVE PROPERTIES CO
4 patentsUS10137320B2Nov 27, 2018
Respirator flow control apparatus and method
3M INNOVATIVE PROPERTIES CO11 citations83
USD575390SAug 19, 2008
Exhalation valve filter
3M INNOVATIVE PROPERTIES CO16 citations76
US11130008B2Sep 28, 2021
Respirator flow control apparatus and method
3M INNOVATIVE PROPERTIES CO3 citations72
USD550837SSep 11, 2007
Frame that supports an exhalation valve filter
3M INNOVATIVE PROPERTIES CO0 citations44