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FERDINAND TONNIES HANS

Overview
  • Total Patents
    13
About

FERDINAND TONNIES HANS has a total of 13 patent applications. Its first patent ever was published in 1931. It filed its patents most often in United States. Its main competitors in its focus markets optics and measurement are PHOTRON LTD, REIMANN HUBERTUS and HANS TOENNIES.

Patent filings in countries

World map showing FERDINAND TONNIES HANSs patent filings in countries
# Country Total Patents
#1 United States 13

Patent filings per year

Chart showing FERDINAND TONNIES HANSs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Optics
#2 Measurement

Focus technologies

# Technology
#1 Cameras
#2 Measuring light

Top inventors

# Name Total Patents
#1 Ferdinand Tonnies Hans 13

Latest patents

Publication Filing date Title
US2250898A Photographic apparatus
US2278338A Photoelectric apparatus for cameras
US2297262A Photographic apparatus
US2209639A Camera diaphragm
US2261532A Photographic apparatus
US2247323A Photographic exposure apparatus
US2285761A Photographic exposure apparatus
US2227166A Photoelectric exposure meter
US2185934A Photoelectric exposure determining apparatus
US2137466A Photoelectric photometer
US2051061A Exposure apparatus for cameras
US2067843A Photoelectric photometer
US1982406A Exposure meter