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HEWSON CARL E

Overview
  • Total Patents
    15
About

HEWSON CARL E has a total of 15 patent applications. Its first patent ever was published in 1955. It filed its patents most often in United States, Canada and Belgium. Its main competitors in its focus markets medical technology, machines and environmental technology are FREY HELMUT, TYCO INTERNAT US INC and PPTT LLC.

Patent filings in countries

World map showing HEWSON CARL Es patent filings in countries
# Country Total Patents
#1 United States 7
#2 Canada 4
#3 Belgium 1
#4 Germany 1
#5 Denmark 1
#6 United Kingdom 1

Patent filings per year

Chart showing HEWSON CARL Es patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Hewson Carl E 15

Latest patents

Publication Filing date Title
US5052390A Method and apparatus for defibrillating the heart using internal esophageal electrode and external chest electrode
US3511275A Fluid pressure biased valve with dashpot
US3351052A Heart and lung resuscitator
US3307541A Heart and lung resuscitator
US3034501A Inflatable heart massager
US2792857A Laundry container
CA821861A Heart and lung resuscitator
CA855507A Heart and lung resuscitator
CA856537A Heart and lung resuscitator
CA857100A Heart and lung resuscitator