ERNST BERTRAM has a total of 12 patent applications. Its first patent ever was published in 1930. It filed its patents most often in United Kingdom and United States. Its main competitors in its focus markets optics, measurement and basic communication technologies are BERTRAM FAB ERNST & WILHELM, CARLSON CO CHESLEY F and EUMIG ELEK ZITATS UND METALLWA.
# | Country | Total Patents | |
---|---|---|---|
#1 | United Kingdom | 11 | |
#2 | United States | 1 |
# | Industry | |
---|---|---|
#1 | Optics | |
#2 | Measurement | |
#3 | Basic communication technologies | |
#4 | Computer technology |
# | Technology | |
---|---|---|
#1 | Cameras | |
#2 | Measuring light | |
#3 | Analogue computers | |
#4 | Tuning resonant circuits |
# | Name | Total Patents |
---|---|---|
#1 | Ernst Bertram | 1 |
Publication | Filing date | Title |
---|---|---|
GB1013409A | Improvements in photographic exposure meters | |
GB1006038A | Improvements in tuning or volume indicators for electronic apparatus | |
GB899782A | Improvements in or relating to photographic cameras diaphragm aperture selecting devices | |
GB728867A | Improved focussing device for photographic cameras | |
GB742599A | Improvements in photographic cameras | |
US1931883A | Photographic exposure-meter |