Archived posting to the Leica Users Group, 1997/10/22
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The subject concerns the use of LTM on newly made lenses like the Ricoh 28 MM lens. Marc Small offered: "The patent on the LTM expired in 1952. The patent on the M bayonet mount expired in 1973." Is it possble that there is an International patent that is blocking the independent manufacture of M mount lenses by companies like Ricoh? Marc and any lawyer types out there, what is the situation with foreign patent time scales? Frank