Inventor

HITZELBERGER JOEL E

US2 patents

Patents

2 patents

US7185394B2Mar 6, 2007

Dirt cup assembly with attachable and detachable external filter holder

PANASONIC CORP NORTH AMERICA18 citations80

US7181804B2Feb 27, 2007

Removable dirt cup assembly with external filter

PANASONIC CORP NORTH AMERICA15 citations78