Your Edits
Responding to your inquiry. Your edits do not explicitly cite what is referenced in the external web site which you use. In no where in the Britannica article does it state that John Larson invented the polygraph in 1921. Secondly, Post-it notes, atomic bombs, etc. are nothing but trivial details which have no absolute relation to the topic of the article the polygraph. 

My suggestion to you. Add your website as an external link at the bottom of the article. If readers want to learn more about what is contained on Britannica's 2003 list, then they'll have that option. However, that edit which you consistently add, does not add any value to the introduction of an article on the polygraph.