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CHANG YEH-CHING

Overview
  • Total Patents
    11
About

CHANG YEH-CHING has a total of 11 patent applications. Its first patent ever was published in 2003. It filed its patents most often in Canada, United Kingdom and United States. Its main competitors in its focus markets machine tools and machines are CHEN CAI-QING, CHENG CHIN-SHUN and GEDORE WERKZEUGFAB O DOWIDAT.

Patent filings in countries

World map showing CHANG YEH-CHINGs patent filings in countries
# Country Total Patents
#1 Canada 3
#2 United Kingdom 3
#3 United States 3
#4 Germany 2

Patent filings per year

Chart showing CHANG YEH-CHINGs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Chang Yeh-Ching 11
#2 Lin Hsien-Cheng 9

Latest patents

Publication Filing date Title
US2014298960A1 Adjustable driving tool
DE102011106971A1 Electronic torque wrench has display unit that is arranged at housing collar, for displaying strain gauge measurement amount of torque applied to wrench head unit that rotates fixing element by connecting with tubular key
CA2744683A1 Electronic torque wrench with a rotatable display unit
GB201110603D0 Electronic torque wrench with rotatable display unit
GB201110605D0 Electronic torque wrench with a rotatable display unit
CA2743395A1 Electronic torque wrench with a rotatable display unit
US2012255404A1 Electronic torque wrench with a rotatable display unit
US2012255405A1 Electronic torque wrench with a rotatable display unit
DE102011001782A1 Electronic torque wrench
CA2434819A1 Tool case
GB0304829D0 Tool case