Inventor
KNIVSLAND DAVID P
US11 patents
⚠️ This page may combine multiple inventors who share the name “KNIVSLAND DAVID P”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MINNESOTA MINING & MFG
4 patentsUS5924420AJul 20, 1999
Full face respirator mask having integral connectors disposed in lens area
MINNESOTA MINING & MFG249 citations98
USD378610SMar 25, 1997
Full face respirator
MINNESOTA MINING & MFG131 citations98
USD409744SMay 11, 1999
Full face respirator lens
MINNESOTA MINING & MFG6 citations73
USD388872SJan 6, 1998
Full face respirator lens
MINNESOTA MINING & MFG12 citations73
3M INNOVATIVE PROPERTIES CO
4 patentsUSD421118SFeb 22, 2000
Inlet port adaptor on a full-face respirator lens
3M INNOVATIVE PROPERTIES CO21 citations90
USD426298SJun 6, 2000
Full-face respirator lens
3M INNOVATIVE PROPERTIES CO16 citations83
US10065056B2Sep 4, 2018
Unitary respirator with molded thermoset elastomeric elements
3M INNOVATIVE PROPERTIES CO3 citations69
USD421301SFeb 29, 2000
Two position pressure demand inlet port adaptor
3M INNOVATIVE PROPERTIES CO0 citations50