PURIFILTER by Matheson Tri-Gas, Inc. (Track this)
Intl: (011) Environmental control apparatus US: 013; 021; 023; 031; 034 Filing date: 01-Jun-1999 Serial number: 75718441
OMNIFILTER by COVIDIEN LP (Track this)
Intl: (010) Medical Apparatus US: 044 Filing date: 10-Feb-1989 Serial number: 73779880
CENTRIFILTER by Voith Paper Inc. (Track this)
Intl: (007) Machinery US: 023 Filing date: 31-Aug-1984 Serial number: 73497329
MULTIFILTER by Philip Morris USA Inc. (Track this)
Intl: (034) Smokers' articles US: 017 Filing date: 20-Nov-1969 Serial number: 72344136