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LEE CHANG-CHUAN

Overview
  • Total Patents
    14
About

LEE CHANG-CHUAN has a total of 14 patent applications. Its first patent ever was published in 2004. It filed its patents most often in Taiwan and United States. Its main competitors in its focus markets machine tools are FRANK CASPER HACHENEY, SPECIALTY TOOLS and CEO TOOL CO LTD.

Patent filings in countries

World map showing LEE CHANG-CHUANs patent filings in countries
# Country Total Patents
#1 Taiwan 13
#2 United States 1

Patent filings per year

Chart showing LEE CHANG-CHUANs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Machine tools

Focus technologies

# Technology
#1 Tools for connecting or disengaging

Top inventors

# Name Total Patents
#1 Lee Chang-Chuan 14

Latest patents

Publication Filing date Title
TW201422381A Wrench
TW201416188A Retractable torque wrench
TW201412469A Control pin and ratchet head using the control pin and ratchet tool using the ratchet head
TW201412472A Bush and torque wrench using the same
TW201345662A Adjustable torque wrench
TW201345649A Production method for a wrench controlling pin
TW201345667A T-shaped wrench
TW201336632A Torque wrench
TW201325828A Spring pad of torque wrench and torque wrench including the same
TW201300202A Socket tool
TW200626308A Improved ratchet wrench
TW200626309A Torque screwdriver
TW200615088A Method for manufacturing control lever of ratchet wrench