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CALDWELL EUGENE W

Overview
  • Total Patents
    19
About

CALDWELL EUGENE W has a total of 19 patent applications. Its first patent ever was published in 1899. It filed its patents most often in United States. Its main competitors in its focus markets electrical machinery and energy, medical technology and optics are COMET ELEKTRON ROEHREN, SIEMENS REINIGER VEIFA and WAITE HARRY F.

Patent filings in countries

World map showing CALDWELL EUGENE Ws patent filings in countries
# Country Total Patents
#1 United States 19

Patent filings per year

Chart showing CALDWELL EUGENE Ws patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Caldwell Eugene W 19

Latest patents

Publication Filing date Title
US2567801A Hot-water air heating unit
US1208474A X-ray screening apparatus.
US1172426A Illuminating and storing apparatus.
US1205708A Photographic developing apparatus.
US1141314A Photographic developing apparatus.
US1217149A X-ray apparatus.
US1174676A Vacuum valve-tube.
US1076949A Valve-tube.
US1217148A X-ray apparatus.
US1029850A X-ray tube.
US1056401A X-ray tube.
US847728A X-ray apparatus.
US931034A X-ray apparatus.
US787561A Electrostatic apparatus.
US797718A Portable x-ray apparatus.
US720888A X-ray apparatus.
US688458A Stereoscopic x-ray apparatus.
US677498A Electric-current interrupter.
US677499A Method of interrupting electric currents.