“Well Gyger is also an trademark so this explains why ’’Paratrace’’ is
different name . Patents are not relevant because expired”
This statement is just confusing because you are comparing a company name, Gyger, and a product name, “Paratrace.”
A company name distinguishes one company from other companies. A brand name distinguishes the products of one company from the products of another company.
It would be very odd indeed for Expert Stylus to market a diamond called the Gyger. I suppose they could, but I assume that Gyger keeps the trademark up to date on its brand. Expert is the only company we are talking about that doesn’t actually bear the name of the company founder. Both Gyger and van den Hul are both eponymously named. Gyger could probably produce a diamond called the “Paratrace” is they wanted to and it might not even cause an issue. After all, people are confused already as to what’s what. MicroLine is often used generically to describe any line contact. But it’s actually a trademarked name, although I notice now that in the latest Audio-Technica materials, the name MicroLine has a large circled “R” for copyright. Legally, I don’t understand how MicroLine is protected by copyright.
Copyright laws do not protect names, titles, or short phrases. Trademark law, by contrast, protects distinctive words, phrases, logos, symbols, slogans, and any other devices used to identify and distinguish products or services in the marketplace
Maybe they lapsed the trademark and are still trying to scare people away from using the name????
I could give you the address of a retipper who installs Gyger diamonds, but that would constitute self-advertising here on Audiogon. I don’t think that’s allowed. You’ll just have to find me on your own.
There is more to the story of the Decca diamond that makes it unique. It’s 0.25mm square. Most manufacturers only go up to 0.20 mm square. The only manufacturer who makes a diamond that large is: you guessed it, Expert Stylus. That’s proof enough for me that Expert makes it. However, I have old FFSS from which I have removed round shank diamonds. So, even though the receiver is a certain size, Decca clearly used smaller diamonds and made up the difference with cement. John Wright prefers to use the largest size diamond he can fit into the receiver but I have retipped Decca with 0.20 mm square diamonds without any problem.