If you interested I found a link to the Shibata Stylus type patent through Vinyl Asylum go to www.uspto.gov/patft/index.html which is the search engine page for U.S patents.Do a number search as follows Shibata 3774918,Van Den Hul 4416005,Gyger 4855989,Ogura 4105212,Namiki 4521877 You might need to add a plug-in for viewing which is available as a link from the site,the Shibata one needs it for it's drawings.Anyway you see the different styluses properly drawn and described-highly informative.
