Ralf Drews

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L ubeck, DE

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Patents Grantslast 30 patents

Information Patent Grant
System for protecting and/or guiding persons in dangerous situations
- Patent number 8,212,211
- Issue date Jul 3, 2012
- Drager Safety AG & Co. KGaA
- Ralf Drews
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Gas-measuring system
- Patent number 7,336,191
- Issue date Feb 26, 2008
- Drager Safety AG & Co. KGaA
- Ralf Drews
- G01 - MEASURING TESTING
Information Patent Grant
Protective breathing mask
- Patent number 6,338,341
- Issue date Jan 15, 2002
- Dräger Sicherheitstechnik GmbH
- Ralf Drews
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Grant
Breathing valve
- Patent number 5,704,348
- Issue date Jan 6, 1998
- Dragerwerk Aktiengesellschaft
- Ralf Drews
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Protective hood made of an elastic material
- Patent number 5,625,902
- Issue date May 6, 1997
- Dr agerwerk AG
- Ralf Drews
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Grant
Breathing apparatus with a display unit
- Patent number 5,601,078
- Issue date Feb 11, 1997
- Dragerwerk AG
- Uwe Schaller
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Grant
Respirator with a breathing filter
- Patent number 5,515,846
- Issue date May 14, 1996
- Dragerwerk AG
- Ralf Drews
- A62 - LIFE-SAVING FIRE-FIGHTING

Patents Applicationslast 30 patents

Information Patent Application
SYSTEM FOR PROTECTING AND/OR GUIDING PERSONS IN DANGEROUS SITUATIONS
- Publication number 20090184244
- Publication date Jul 23, 2009
- Drager Safety AG & Co. KGaA
- Ralf DREWS
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Application
GAS-MEASURING SYSTEM
- Publication number 20070063828
- Publication date Mar 22, 2007
- Drager Safety AG & Co. KGaA
- Ralf DREWS
- G01 - MEASURING TESTING
Information Patent Application
Gas mask with a ring-shaped sealing element and breathing filter wi...
- Publication number 20030200969
- Publication date Oct 30, 2003
- Hartmut Kintzel
- A62 - LIFE-SAVING FIRE-FIGHTING