Inventor

ZELLER PAUL A

US5 patents

Patents

5 patents

US7089603B2Aug 15, 2006

Adjustable headband

MINE SAFETY APPLIANCES CO21 citations90

US6345620B2Feb 12, 2002

Flexible respirator filter

MINE SAFETY APPLIANCES CO38 citations90

US7261104B2Aug 28, 2007

Respirator facepieces

MINE SAFETY APPLIANCES CO54 citations89

US7296305B2Nov 20, 2007

Adjustable headband

MINE SAFETY APPLIANCES CO17 citations78

US6481023B2Nov 19, 2002

Suspension for protective headgear

MINE SAFETY APPLIANCES CO8 citations68