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ELFRIEDE DRAGER

Overview
  • Total Patents
    12
About

ELFRIEDE DRAGER has a total of 12 patent applications. Its first patent ever was published in 1922. It filed its patents most often in United States and United Kingdom. Its main competitors in its focus markets consumer goods, medical technology and machines are ALEXANDER BERNHARD DRAGER, GRIFFITHS STEPHEN and SHIGEMATSU WORKS.

Patent filings in countries

World map showing ELFRIEDE DRAGERs patent filings in countries
# Country Total Patents
#1 United States 10
#2 United Kingdom 2

Patent filings per year

Chart showing ELFRIEDE DRAGERs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Elfriede Drager 5
#2 Christian Schroder Hans Wilhel 2
#3 Hermann Stelzner 1

Latest patents

Publication Filing date Title
US1843446A Cartridge for independent breathing apparatus
GB292531A Improvements in and relating to protective gas-masks respirators and the like
GB289808A Improvements in and relating to protective gas-masks
US1710813A Protective mask for use in noxious gases
US1683144A Inhaling apparatus for narcotics
US1691648A Breathing device
US1702400A Gas protective mask
US1693730A Breathing apparatus particularly for administering anesthetics
US1684664A Self-contained breathing apparatus
US1679116A Breathing tube for self-rescue apparatus
US1695537A Self-contained lung-power breathing device