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SFD LAB INC

Overview
  • Total Patents
    98
About

SFD LAB INC has a total of 98 patent applications. Its first patent ever was published in 1960. It filed its patents most often in United States, United Kingdom and Germany. Its main competitors in its focus markets electrical machinery and energy, telecommunications and basic communication technologies are S F D LAB, NUNOGAKI MASANOBU and ANDERSEN & MEYER ELEK ARTIKLER.

Patent filings in countries

World map showing SFD LAB INCs patent filings in countries
# Country Total Patents
#1 United States 40
#2 United Kingdom 30
#3 Germany 17
#4 France 7
#5 Canada 2
#6 Sweden 2

Patent filings per year

Chart showing SFD LAB INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Farney George K 14
#2 Joseph Feinstein 9
#3 Jerome Drexler 6
#4 K Farney George 5
#5 Glenfield George E 5
#6 Mcdowell Hunter L 5
#7 Feinstein Joseph 4
#8 E Glenfield George 3
#9 Kenneth Farney George 3
#10 Robert Angle 2

Latest patents

Publication Filing date Title
GB1240792A Helix-coupled impedance transformers and tubes using same
DE1791201A1 Cross field microwave amplifier tubes
US3521115A Helix coupled impedance transformer and tubes using same
US3508110A Dual stage axially injected reentrant stream crossed-field tube
US3479556A Reverse magnetron having an output circuit employing mode absorbers in the internal cavity
US3441793A Reverse magnetron having a circular electric mode purifier in the output waveguide
US3441792A Reverse magnetron having a tie ring stiffening structure for its cathode support fingers
US3441795A Ditherable and tunable microwave tube having a dithered tuner actuator of fixed length
US3437866A Non-reflective internal lossy terminations for slow wave circuits and tubes using same
US3448330A Crossed-field reentrant stream tandem slow wave circuit tube
GB1298191A Microwave noise source tube
US3414756A Impedance matched periodic microwave circuits and tubes using same
US3445718A Mixed line magnetron circuits having strapped sections and tubes using same
US3437875A Mixed line composite magnetron interaction circuits of forward wave and backward wave types
US3427499A Mixed line interaction circuits for coaxial magnetrons
US3427495A Dual helix coupled periodic circuits and tubes using same
US3436594A Slow wave circuit having an array of half wave resonators coupled via an array of quarter wave resonators
US3412284A Microwave tube apparatus having an improved slot mode absorber
US3411034A Microwave amplifier tube having capacitive loading means for the slow wave circuit
US3387169A Slow wave structure of the comb type having strap means connecting the teeth to form iterative inductive shunt loadings