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FRIEMANN & WOLF GMBH

Overview
  • Total Patents
    168
About

FRIEMANN & WOLF GMBH has a total of 168 patent applications. Its first patent ever was published in 1904. It filed its patents most often in Germany, France and Switzerland. Its main competitors in its focus markets electrical machinery and energy, environmental technology and measurement are FRIEMANN & WOLF GES MIT BESCHR, HENRY HYMAN and HUGO MAEHLER.

Patent filings per year

Chart showing FRIEMANN & WOLF GMBHs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Werding N 6
#2 Werding Norbert 5
#3 Bock Ortwin 5
#4 Bothe Michael 4
#5 Roehnert Hans 4
#6 Grad Peter 3
#7 Krauss Hans 2
#8 Wolf Dr H C Paul 2
#9 Stoppel Harry 2
#10 Friemann Erich 2

Latest patents

Publication Filing date Title
DE19500943C1 Planar transformer for switched-mode power supplies for the generation of extra-low voltages and method for its production
DE4322087A1 Plug-in power supply for the power supply of electrical devices
DE3718642C1 Dimmed vehicle headlights for mine vehicles
DE3533750C1 Explosion-proof and/or flameproof electrical power supply unit having an alternator which is driven by compressed air
DE3511034C1 U-shaped retaining bracket for fuse links
DE3323958A1 Transformer having an iron core which is composed of sheet-metal laminates
DE2947008A1 Emergency supply for mains-operated fluorescent tube - has diode and thyristor in one mains lead, for reducing positive or negative wave portion
DE2933596B1 Switching arrangement for a safety light supply device for fluorescent lamps
DE2909965A1 EXPLOSION AND / OR FLASH-PROTECTED HEAD LAMP
DE2904875A1 SWITCHING ARRANGEMENT FOR A SAFETY LIGHT SUPPLY DEVICE FOR FLUORESCENT LAMPS
CH556106A CIRCUIT ARRANGEMENT IN AN EMERGENCY POWER SUPPLY DEVICE WITH AN ACCUMULATOR AND A CONSUMER.
DE2142520A1 SUPPORT FRAMEWORK FOR NEGATIVE ELECTRODES OF ALKALINE ACCUMULATORS
DE2135939A1 SWITCHING DEVICE FOR ACCUMULATORS FOR CONTROLLING AND MONITORING THE CHARGING AND DISCHARGE CURRENT
DE2134535A1 EMERGENCY LIGHTING DEVICE
DE2039471A1 Accumulator lamp, in particular head lamp
DE2016207A1 Alkali amalgam prodn in electrolytic cell
DE1955858A1 Process for the production of pure nickel-II-hydroxide
DE1952648A1 Wall lamp with emergency generator
DE1925783A1 Compressed air-operated power generator for lights that can be used in potentially explosive rooms
DE1907326A1 Manufacture of porous nickel electrodes - of uniform fine porosity