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Old 11th December 2017, 17:47   #1  |  Link
hajj_3
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DTS audio patents expiration date?

http://dts.com/patents/bd-dvd-players

On this link there is "DTS Digital Surround" and "2.0 Digital Out".

"DTS Digital Surround" patents:

European patent 0864146: http://www.google.com/patents/EP0864146
U.S patent 5,956,674: https://www.google.co.uk/patents/US5956674
U.S patent 5,974,380: https://www.google.co.uk/patents/US5974380
U.S patent 5,978,762: https://www.google.co.uk/patents/US5978762
U.S patent 6,487,535: https://www.google.co.uk/patents/US6487535

It also says "as well as other U.S. and international patents both issued & pending." Does anyone know if there are any other patents, if so why aren't they listed them on this page?

Do these patents expire 20yrs after the filing date or granted date? If it is from filing date then the last patent expires on Nov 4th 2018.

"2.0 and Digital Out" patents:

European patent 0864146: http://www.google.com/patents/EP0864146
European patent 1741093: http://www.google.com/patents/EP1741093
U.S patent 5,956,674: https://www.google.co.uk/patents/US5956674
U.S patent 5,974,380: https://www.google.co.uk/patents/US5974380
U.S patent 5,978,762: https://www.google.co.uk/patents/US5978762
U.S patent 6,487,535: https://www.google.co.uk/patents/US6487535
U.S patent 7,333,929: https://www.google.co.uk/patents/US7333929
U.S patent 7,548,853: https://www.google.co.uk/patents/US7548853

20 june 2026 is the date that the last u.s patent expires and march 21st 2025 for the last european patents for 20yrs after the filing date.

If a software dvd player for computers wanted to playback movie dvds that contain a DTS audio track, would it need any of the patents in the "2.0 and digital out" patents list?

Last edited by hajj_3; 11th December 2017 at 20:27.
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Old 11th December 2017, 19:56   #2  |  Link
Reartiong
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i can't actually help as i can't answer your question. however, i want to say thanks for the links and i will be coming back checking for updates, maybe someone can help.
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Old 12th December 2017, 12:21   #3  |  Link
Ghitulescu
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Quote:
Originally Posted by hajj_3 View Post
Do these patents expire 20yrs after the filing date or granted date?
Filing date.

Yet one has to be very careful (I sense a dark force raising here ), as usually the whole thing is more likely a whole package, patents, designs, copyrights and stuff, all nicely packaged and put in the hands of the respective companies.

In the US there are cases of reissued patents.

And most of the patents are actually slight improvements, still covering the old "inventions", which are still "dangerous" for the public to touch. That's why a patent attorney is paid so much, to use any trick possible to get more coverage and duration for his client.
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