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ALLAN BERTRAM FIELD

Overview
  • Total Patents
    12
About

ALLAN BERTRAM FIELD has a total of 12 patent applications. Its first patent ever was published in 1918. It filed its patents most often in United Kingdom and France. Its main competitors in its focus markets electrical machinery and energy, transport and environmental technology are BAO XIAOFU, SCHOTTEL GMBH & CO KG and CHUETSU WAUKESHA KK.

Patent filings in countries

World map showing ALLAN BERTRAM FIELDs patent filings in countries
# Country Total Patents
#1 United Kingdom 11
#2 France 1

Patent filings per year

Chart showing ALLAN BERTRAM FIELDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Field Allan Bertram 1

Latest patents

Publication Filing date Title
GB331188A Improvements in dynamo-electric machines
GB302048A Improvements in or relating to electric circuit breakers
GB234936A Improvements in electrical synchronising apparatus
GB203861A Improvements in electrical marine propulsion
GB202771A Improvements relating to electrical marine propulsion
GB194095A Improvements relating to electric power drives
GB193208A Improvements relating to indicating devices for use with alternating-current electric generators driving induction electric motors
GB190761A Improved devices for balancing the currents in parallel-connected conductors for heavy alternating-currents
GB179647A Improvements relating to rotors for electric generators
GB172703A Improvements relating to the ventilation of dynamo-electric machines
GB164114A Improvements in or relating to dynamo-electric machines