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W D ZEHNER

Overview
  • Total Patents
    14
About

W D ZEHNER has a total of 14 patent applications. Its first patent ever was published in 1902. It filed its patents most often in United States. Its main competitors in its focus markets transport, electrical machinery and energy and control are OTKRYTOE AKTSIONERNOE OBSHCHESTVO NAUCHNO ISSLEDOVATELSKIJ I PROEKTNO KONSTRUKTORSKIJ INSTITUT INFOR, AUXILIAIRE D ETUDES ELECTROTEC and HYUKSHIN ENGINEERING CO LTD.

Patent filings in countries

World map showing W D ZEHNERs patent filings in countries
# Country Total Patents
#1 United States 14

Patent filings per year

Chart showing W D ZEHNERs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Souder Howell W 14

Latest patents

Publication Filing date Title
US800179A Electric signaling system.
US795314A Signaling system.
US789239A Electric signal system.
US789240A Signaling system.
US782285A Signal-lamp.
US774897A Block-signal system for electric railroads.
US773040A Block-signal system.
US777555A Electric signaling system.
US773039A Signaling system.
US735420A Semaphore-operating device.
US735419A Trolley-contact.
US735418A Signal apparatus.
US735417A Electric signaling apparatus.
US735416A Electric signaling apparatus.