EW

Elfed I. Williams

3M: 11 patents #1,441 of 11,543Top 15%
Overall (All Time): #468,806 of 4,157,543Top 15%
11
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
7497217 Method of making a filter cartridge using a thermoforming step Andrew S. Viner, Audra A. Conlan, Brian Cormack, Malcolm R. Watson, Christopher P. Henderson +1 more 2009-03-03
7069931 Method of making a filtering face mask that has an exhalation valve attached thereto Desmond T. Curran 2006-07-04
7007695 Manner of attaching component elements to filtration material such as may be utilized in respiratory masks Desmond T. Curran 2006-03-07
6959709 Manner of attaching component elements to filtration material such as may be utilized in respiratory masks Desmond T. Curran 2005-11-01
6874499 Filter element that has a thermo-formed housing around filter material Andrew S. Viner, Audra A. Conlan, Brian Cormack, Malcolm R. Watson, Christopher P. Henderson +1 more 2005-04-05
6604524 Manner of attaching component elements to filtration material such as may be utilized in respiratory masks Desmond T. Curran 2003-08-12
6286144 Protective garments incorporating bands of welded or adhesively-bonded elastomeric material Christopher P. Henderson, James Fewtrell, Nicholas J. Gloag 2001-09-11
6148817 Multi-part headband and respirator mask assembly and process for making same John W. Bryant, Desmond T. Curran, James F. Dyrud, Christopher P. Henderson, Harold J. Seppala 2000-11-21
6125849 Respiratory masks having valves and other components attached to the mask by a printed patch of adhesive Desmond T. Curran 2000-10-03
6070579 Elastomeric composite headband John W. Bryant, Desmond T. Curran, James F. Dyrud, Christopher P. Henderson, Dennis L. Krueger +1 more 2000-06-06
5724677 Multi-part headband and respirator mask assembly and process for making same John W. Bryant, Desmond T. Curran, James F. Dyrud, Christopher P. Henderson, Harold J. Seppala 1998-03-10