What Happened to Patent Number Discs?

Have you ever been shopping for discs online and come across sellers who advertise ‘patent number’ discs? This commonly indicates a particularly old and desirable run of discs - especially with regards to Innova and Millennium discs. But do you know what those numbers actually mean and why they are no longer being manufactured today?
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CHAPTERS
0:00 Patent Number Discs
1:01 Utility Patents
1:44 Patent Law Before 2011
2:55 Patent Marking Trolls
3:28 Patect Sues Innova & Millennium
5:53 Thanks For Watching
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[@SunKingDiscSports]

One thing to add is that there are only a handful of patents that were ever used on golf discs; the main Innova "beveled edge disc" patent and the "thumbtrac" patent on Rhynos and Birdies are the most notable. Other manufacturers had to pay a licensing fee to Innova until the patent ran out in 2003. MVP has patents regarding their Gyro technology despite there being many overmolded discs prior to MVP's existence and MVP sort of violates their own patents (in a way) by producing discs with the same plastic (and subsequently density) for both the core and the rim, which is the opposite of Gyro technology states the reason a patent is needed.

[@firechimp1]

Lat64 for a short while around 2018 or so had overmolded discs like the Zion and Bryce. They were actually pretty decent but the rumour was that MVP sent a cease and desist

[@IceBergTV]

Extremely interesting thank you

[@koroba01]

Whenever I bought a disc I had zero worry about whether or not there was a patent number on the disc, never looked to see if the disc had a patent number. After spending a good part of my career in construction equipment manufacturing (with some patent protection issues) I can see advertising that a product has a certain advantageous feature that has a patent but not to advertise that an item has a patent number on it. I really do not care for companies like Pateck, they are vultures.

[@Chaser90EK]

Explains why MVP molds have a website for their patent information on their discs instead of the #