Interchangeable core (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Interchangeable core" in English language version.

refsWebsite
Global rank English rank
800th place
676th place
low place
low place

espacenet.com

worldwide.espacenet.com

  • US 3206958, Best, Frank Ellison, "Interchangeable lock cores", published 1965-09-21 
  • US 1384022, Best, Frank Ellison, "Lock", published 1921-07-05 
  • CN 203334826, Zhang, Yihui, "Passive electronic lock and key", published 2013-12-11 , since abandoned.

hlflake.com

  • "SFIC & LFIC Interchangeable Cores". www.hlflake.com.