Just seeing that ZXPC on ebay that carries many different horns is now carrying the Klipsch aftermarket replacement K-510 horn for only $49.99. It looks just like it, design and quality wise.
Just wondering if anyone has tried it yet to confirm what quality build is like? Looks like the few who have requested him to carry the K-510 horn has finally gotten their wish now.
These two were never patented (i.e. the non-mumps version of the K-510 and the K-402). The mumps was patented by Roy Delgado/KGI. The grant was awarded in 2010 with expiration in 2027 (i.e., 20 years from the date of application).
An inventor has 12 months from first public disclosure of a patentable invention to file for a patent on that idea. After that, no patent can be issued. After 20 years from the submittal of a patent application, the patent runs out: all th