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Class Information
Number: 128/206.17
Name: Surgery > Respiratory method or device > Means for removing substance from respiratory gas > Particulate filtering > Face mask covering a breathing passage > With separate filter encircling element, or housing, securing filter on mask
Description: Subject matter including a separate filter encircling element, or housing, securing the filter on the mask.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5224474 |
Retrofitting gas mask voice amplifier unit with easily actuated switch means |
Jul. 6, 1993 |
| 5222488 |
Respirator air filter cartridge with a replaceable filter element |
Jun. 29, 1993 |
| 5181507 |
Air purifying respirator suspension |
Jan. 26, 1993 |
| 5148803 |
Respirator mask with easy-to-change respirator filter |
Sep. 22, 1992 |
| 5140980 |
Hood mask and air filter system and method of manufacture thereof |
Aug. 25, 1992 |
| 5104430 |
Mask with an air filtering device |
Apr. 14, 1992 |
| 5086768 |
Respiratory protective device |
Feb. 11, 1992 |
| 5069205 |
Quick-donning head harness assembly |
Dec. 3, 1991 |
| 5063926 |
Respirator cartridge with sealant dispersion member |
Nov. 12, 1991 |
| 5062421 |
Respiratory mask having a soft, compliant facepiece and a thin, rigid insert and method of making |
Nov. 5, 1991 |
| 5036844 |
Cover assembly and pre-filter for a respirator |
Aug. 6, 1991 |
| 5033507 |
Filter cover assembly for a respirator |
Jul. 23, 1991 |
| 5022394 |
Heat and moisture exchanger device for tracheostomy patients |
Jun. 11, 1991 |
| 5018518 |
Gas work with sensing and alarm means |
May. 28, 1991 |
| 4964900 |
Respirator filter means for removal of tritiated water |
Oct. 23, 1990 |
| 4961420 |
Gas mask for operation in contaminated areas |
Oct. 9, 1990 |
| 4945907 |
Face mask |
Aug. 7, 1990 |
| 4934361 |
Respirator |
Jun. 19, 1990 |
| 4932399 |
Device for replacing the filter of a gas mask in a polluted atmosphere without any contamination risk |
Jun. 12, 1990 |
| 4886058 |
Filter element |
Dec. 12, 1989 |
| 4881538 |
Respirator air guide |
Nov. 21, 1989 |
| 4865637 |
Filter cartridge |
Sep. 12, 1989 |
| 4856508 |
Face mask |
Aug. 15, 1989 |
| 4850346 |
Respirator |
Jul. 25, 1989 |
| 4832018 |
Filter case holder |
May. 23, 1989 |
| 4793342 |
Emergency smoke hood and breathing mask |
Dec. 27, 1988 |
| 4771771 |
Gas mask having a protective hood |
Sep. 20, 1988 |
| 4714486 |
Automated production of canisters |
Dec. 22, 1987 |
| 4688567 |
Gas mask |
Aug. 25, 1987 |
| 4686976 |
Safety mask |
Aug. 18, 1987 |
| 4677976 |
Emergency mask |
Jul. 7, 1987 |
| 4674492 |
Alarm system for respirator apparatus and method of use |
Jun. 23, 1987 |
| 4630604 |
Valve assembly for a replaceable filter respirator |
Dec. 23, 1986 |
| 4628927 |
Reversible face mask with replaceable air filter insert |
Dec. 16, 1986 |
| 4595003 |
Protective mask for airborne toxic substances |
Jun. 17, 1986 |
| 4592350 |
Respirator |
Jun. 3, 1986 |
| 4579113 |
Disposable covers for respirators |
Apr. 1, 1986 |
| 4573464 |
Filter respirator for protection against smoke and toxic gases |
Mar. 4, 1986 |
| 4562837 |
Air escape filter apparatus |
Jan. 7, 1986 |
| 4549543 |
Air filtering face mask |
Oct. 29, 1985 |
| 4548626 |
Particulate air filter assembly |
Oct. 22, 1985 |
| 4520509 |
Mask with removable countercurrent exchange module |
Jun. 4, 1985 |
| 4501272 |
Mask |
Feb. 26, 1985 |
| 4467795 |
Breathing device package |
Aug. 28, 1984 |
| 4453544 |
Universal canister mount |
Jun. 12, 1984 |
| 4433684 |
Assembly for administering respiratory medicament dosage through a gas mask |
Feb. 28, 1984 |
| 4414973 |
Respirator face mask |
Nov. 15, 1983 |
| 4334901 |
Respirator cartridge |
Jun. 15, 1982 |
| D262322 |
Nasal cannula mouth mask |
Dec. 15, 1981 |
| 4304230 |
Liquid barrier filter and method of operation |
Dec. 8, 1981 |
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