Thinking there has been prior builds / prior art ? (corrected)

tajanes

https://audioxpress.com/news/alta-audio-receives-us-patent-for-its-xtl-ii-hybrid-transmission-line-technology

rjj45

That's curious, looks exactly like MLTLs as descibed by Ausgpurger 60 years ago. What's the novel improvement that warranted a patent?

tajanes

This looks like a port at the end of a transmission line… this post was dated 2013-03-13 diyAudio Forum

Which makes this (I believe) public disclosure / public use

tajanes

https://patents.google.com/patent/US11917361B2/en?oq=11,917,361+
This application was filed: 2021-08-12

Not like there’s a USPTO rule; 2001 Duty of Disclosure, Candor, and Good Faith [R-08.2017] or anything… Oh, snap.

I’m sure it all passed muster as a novel improvement

Wolf

It's an MLTL, called something else. Marketing patent development.

tajanes

@Wolf said:
It's an MLTL, called something else. Marketing patent development.

'Better sound through marketing'... think this strategy has been borrowed from another consumer electronics co... ha

ScottS

US Patents have been first to file since 2013. If the claimed invention was in the public domain before filing, then it shouldn't have been allowed and is not a valid patent. At this point, that would become an issue if the patent owner ever tried to enforce it.

tajanes

@ScottS said:
US Patents have been first to file since 2013. If the claimed invention was in the public domain before filing, then it shouldn't have been allowed and is not a valid patent. At this point, that would become an issue if the patent owner ever tried to enforce it.

You are correct. I should have stopped at prior art.