BIRKA REGULATOR AB innovation strategy

Patent filings in countries

#	Industry
#1	Electrical machinery and energy
#2	Control
#3	Civil engineering
#4	Measurement

#	Technology
#1	Electric switches
#2	Special electric heating or lighting
#3	Systems controlling non-electric variables
#4	Earth drilling
#5	Measuring temperature
#6	Cables and insulators
#7	Alarm systems
#8	Resistors
#9	Electric incandescent lamps

#	Name	Total Patents
#1	Osvald Appelberg Axel	10
#2	Birka Regulator Aktiebolaget	8
#3	Wilhelm Appelberg Carl	3
#4	Gilliver Gilbert	2
#5	Appelberg Axel Osvald	2
#6	O Appelberg A	2
#7	Gilliver G	1
#8	Appelberg A O	1
#9	Olof Borgstrom Harry	1

Publication	Filing date	Title
GB386099A	1931-12-07	Improvements in thermal switches
GB389141A	1931-09-11	Improvements in and relating to electric thermal relays
DE673410C	1931-09-04	Electrothermal switch
US1935761A	1931-07-16	Thermal switch
GB363278A	1931-05-18	Improvements in thermal switches
US1894843A	1931-04-24	Thermal switch
US1894842A	1931-03-10	thermostat switch
GB358551A	1930-07-04	Improvements in electrical regulating devices
US1908676A	1930-06-27	Electrical regulating device
GB345881A	1930-05-22	Improvements in or relating to thermal switches for controlling electrical apparatus
GB356110A	1930-05-22	Improvements in or relating to thermal cut-out switches
US1822191A	1930-05-21	Thermostat switch
US1851657A	1928-03-15	Thermostatic switch
GB287453A	1928-03-13	Improvements in or relating to thermostatic switches
US1661103A	1925-11-03	Thermostatic regulating device for heat-producing apparatus
GB242252A	1925-10-08	Improvements in thermostatic regulating devices for electric heat-producing apparatus
US1700661A	1925-09-11	Thermostatic control system for electric heat-producing apparatus
US1741601A	1924-07-03	Thermostatic make and break switch
GB195974A	1923-04-05	Improvements in electrically and thermostatically controlled apparatus
GB195942A	1923-02-26	Improvements in electric thermostatic time switches