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HARTFORD NAT BANK & TRUST CO

Overview
  • Total Patents
    1,631
About

HARTFORD NAT BANK & TRUST CO has a total of 1,631 patent applications. Its first patent ever was published in 1934. It filed its patents most often in United States. Its main competitors in its focus markets electrical machinery and energy, basic communication technologies and machines are HEINTZ & KAUFMAN LTD, MULLARD RADIO VALVE CO LTD and RAYTHEON MFG CO.

Patent filings in countries

World map showing HARTFORD NAT BANK & TRUST COs patent filings in countries
# Country Total Patents
#1 United States 1,631

Patent filings per year

Chart showing HARTFORD NAT BANK & TRUST COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Herman Hugenholtz Eduard 37
#2 Otto Strutt Maximiliaan Julius 32
#3 Der Ziel Aldert Van 31
#4 Marie Adrianus Johannes Wilhel 29
#5 Gerard Hepp 28
#6 Hendrik Jonker Johan Lodewijk 27
#7 Weenen Franciscus Lambertus Va 25
#8 Bertold Buchner Robert 24
#9 Gesinus Diemer 23
#10 Weel Adelbert Van 22

Latest patents

Publication Filing date Title
US3724844A Exercise stand for bicycles
US3015153A Method of making a heat regenerator
US2781667A Record player
US2780767A Circuit arrangement for converting a low voltage into a high direct voltage
US2775716A Synchronous motor comprising an armature having permanent magnetic poles
US2770109A Freezer and cooled chamber construction of a cold-gas refrigerator
US2775875A Regenerator construction of a cold-gas refrigerator
US2775876A Regenerator construction of a cold-gas refrigerator
US2764879A Cooler construction in a hot-gas engine
US2781647A Cold-gas refrigerator
US2755457A Tuning indicator
US2784369A Voltage divider
US2728834A Resistive element for variable electrical resistor
US2816267A Pulse-code modulation device
US2771751A Gas-fractionating installation
US2776372A Stabilized transistor oscillator
US2727830A Method of applying light-diffusing layer to a glass surface
US2751525A Permanent magnet
US2741715A Stator for single-phase induction motor
US2784574A Transversely flexible coupling