Learn more

IVAR DROLSHAMMER

Overview
  • Total Patents
    38
About

IVAR DROLSHAMMER has a total of 38 patent applications. Its first patent ever was published in 1919. It filed its patents most often in Germany, United Kingdom and United States. Its main competitors in its focus markets transport and engines, pumps and turbines are CAMM J O, MARCHESINI LUIGI and OKATSUNE HAGURUMA SEISAKUSHO K.

Patent filings in countries

World map showing IVAR DROLSHAMMERs patent filings in countries
# Country Total Patents
#1 Germany 20
#2 United Kingdom 8
#3 United States 8
#4 Switzerland 2

Patent filings per year

Chart showing IVAR DROLSHAMMERs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Ivar Drolshammer 9
#2 Gustav Drolshammer 1

Latest patents

Publication Filing date Title
GB583685A Improvements in or relating to internal combustion engines of the multi-cylinder opposed-piston type
US1729931A Valve mechanism for compressed-air brakes
GB279264A Improvements in valve mechanism for compressed air brakes
GB252115A Improvements in valve mechanism for pneumatic brakes
US1602656A Compressed-air brake
GB264197A Improvements in or relating to compressed-air brakes
GB225566A Improvements in valve mechanism for compressed air brakes
US1568368A Valve mechanism for compressed-air brakes
US1527127A Compressed-air brake for railway vehicles and the like
GB219331A Improvements in compressed air brakes for railway and like vehicles
US1544637A Compressed-air brake for railway trains and the like
US1536572A Railway brake
GB214092A Improvements in valve mechanism for railway brakes
US1462229A Pneumatic brake
GB188002A Improvements in or relating to pneumatic brakes
US1401325A Adjustable brake arrangement operated by compressed fluid, adapted to be used in railway-trains or the like