>As I understand it (could be >wrong), it was Asahi Optical that developed and patented the current >process >that makes such accurate coatings mass producible. I further understand >that >(at least for some time), companies that desired to produce accurate >multicoatings paid a royalty to Asahi Optical. Some companies elected to >license only a part of the process, others decided to go their own way.
But is it true that after certain period, the patent will be made open and everyone could copy it? If true, after how many years? regards, Alan Chan _________________________________________________________________ Send and receive Hotmail on your mobile device: http://mobile.msn.com - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
