Learn more

DAVID FRANCIS

Overview
  • Total Patents
    27
About

DAVID FRANCIS has a total of 27 patent applications. Its first patent ever was published in 1970. It filed its patents most often in France, Canada and EPO (European Patent Office). Its main competitors in its focus markets electrical machinery and energy, audio-visual technology and transport are HOFFMEISTER & SOHN GMBH, AUSTROLUX WIENER ELEKTRO and REGGIANI ILLUMINAZIONE.

Patent filings in countries

World map showing DAVID FRANCISs patent filings in countries
# Country Total Patents
#1 France 24
#2 Canada 1
#3 EPO (European Patent Office) 1
#4 United States 1

Patent filings per year

Chart showing DAVID FRANCISs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 David Francis 6
#2 David Francis Jules Georges 3
#3 Francis David 2
#4 Jules 1
#5 Georges 1

Latest patents

Publication Filing date Title
FR2909160A1 Spot led diode.
FR2788193A1 Method for producing an electronic element comprising a semiconductor component with an insulated medium and a radiator
FR2771587A1 Relay-shunt for low voltage electric lamp, mounted in series
FR2700074A1 Device for supplying low voltage bulbs.
FR2688867A1 Adjustable lighting device integrated in a false ceiling.
EP0457645A2 Lighting device
FR2675239A1 Lighting device with thermal shield.
FR2669098A1 Lighting device with removable and adjustable reflector and bulb.
FR2662235A1 Lighting device comprising a lighting bulb arranged inside a reflector.
FR2620515A1 Adjustable support for recessed lamp
FR2594270A1 Protection of series supply circuits for lamps
FR2587786A1 System for solidarizing a light source with a reflector
FR2562638A1 Lighting projector
FR2537165A1 Obtaining dyed light beams by direct electrochemical dying of aluminum reflective mirrors
FR2533669A1 Lighting projector
FR2486753A1 Shunt for protecting incandescent lamps - comprises a ceramic semiconductive oxide with non-linear resistance
FR2484607A1 Reflector system associated with the lamp
FR2454200A1 Halogen lamp reflector and socket - has protective ceramic skirt fitting into reflector neck