Sreekanth US1925764

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Title: US1925764 - Text Title unavailable - see image for title

Inventor: Le Duc

Issue Date: 1933-09

Current U.S. Class: 128/206.12: SURGERY; RESPIRATORY METHOD OR DEVICE; Means for removing substance from respiratory gas; Particulate filtering; Face mask covering a breathing passage
128/206.24: SURGERY; RESPIRATORY METHOD OR DEVICE; Face mask covering a breathing passage; Mask/face sealing structure


Forward References: 10 patents reference this one
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Patent  Pub.Date  Inventor Assignee Title
Buy PDF- 8pp US7530354 2009-05-12 Hanlon; Mark Douglas   Distending nasal air filter
Buy PDF- 20pp US6805124 2004-10-19 Japuntich; Daniel A. 3M Innovative Properties Company Face mask that has a filtered exhalation valve
Buy PDF- 23pp US6584976 2003-7 Japuntich; Daniel A. 3M Innovative Properties Company Face mask that has a filtered exhalation valve
Buy PDF- 17pp US6460539 2002-10-08 Japuntich; Daniel A. 3M Innovative Properties Company Respirator that includes an integral filter element, an exhalation valve, and impactor element
Buy PDF- 9pp US5941244 1999-08-24 Yamazaki; Tomohiro Mitsumasa CHINO Dustproof mask
Buy PDF- 8pp US5419318 1995-05-30 Tayebi; Amad Better Breathing, Inc. Breathing mask
Buy PDF- 12pp US4945907 1990-08-07 Tayebi; Amad New England Thermoplastics, Inc. Face mask
Buy PDF- 7pp US4628927 1986-12-16 Ward; Russell G.   Reversible face mask with replaceable air filter insert
Buy PDF- 5pp US4323063 1982-04-06 Fisichella; Jeanne M.   Medical face mask
Buy PDF- 9pp US3688768 1972-09-05 GEORGE PAUL REIMSCHUSSEL Johns-Manville Corporation DISPOSABLE FACE RESPIRATOR AND METHOD OF MAKING SAME


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