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CHANG A SHEN

Overview
  • Total Patents
    22
About

CHANG A SHEN has a total of 22 patent applications. Its first patent ever was published in 1984. It filed its patents most often in Australia, France and United Kingdom. Its main competitors in its focus markets civil engineering, machines and machine tools are ROSENBAUM HARRY S, GUARDIAN IGU LLC and SANI MASKINER AB.

Patent filings in countries

World map showing CHANG A SHENs patent filings in countries
# Country Total Patents
#1 Australia 5
#2 France 5
#3 United Kingdom 5
#4 United States 5
#5 Canada 2

Patent filings per year

Chart showing CHANG A SHENs patent filings per year from 1900 to 2020

Focus industries

Focus technologies

Top inventors

# Name Total Patents
#1 Chang A-Shen 16
#2 Chang A Shen 1

Latest patents

Publication Filing date Title
GB8729124D0 Vertical blind slats with externally gripping end pieces
AU8250487A Improved vertical blind slat whipstitch
US4823449A Automatic and continuous mechanism for processing and assembling venetian blind slats
GB8725331D0 Blind supporting track assembly
US4791703A Length adjustable center rod structure for a vertical shutter drape
CA1278981C Length adaptor for the rail in a venetian blind, vertical or horizontal
AU573463B1 Length adaptor for the rail in a venetian blind
AU573462B1 Shutter leaf steering and drape release for venetian blinds
AU6504486A Vertical blinds
GB2196043A Vertical blinds
AU4828285A A continuous mechanism for remoulding length-setting and assembling blind's plastic strips
FR2586967A3 Continuously operating mechanism for winding, adjusting length and joining plastic strip of a store
CA1245838A Continuous mechanism for re-moulding, length-setting and assembling blind's plastic strips
GB8420985D0 Venetian blinds