| Patent Number |
Title Of Patent |
Date Issued |
| 7031358 |
Semiconductor laser driving apparatus |
April 18, 2006 |
| A laser beam is obtained from a semiconductor laser by a stable emission light amount. A first semiconductor laser is thermally coupled with a second semiconductor laser and driven by a feedback circuit constructed by a photodetector, an I-V converter, and a current generator so as to |
| 7014680 |
Method for preparing DDR type zeolite membrane, DDR type zeolite membrane, and composite DDR typ |
March 21, 2006 |
| A DDR type zeolite membrane formed on a substrate includes silica as a main component. The DDR type zeolite membrane separates at least one type of a gas component from a mixed gas containing at least two types of gases selected from a group consisting of carbon dioxide (CO.sub.2), h |
| 6953493 |
Method for preparing DDR type zeolite membrane, DDR type zeolite membrane, and composite DDR typ |
October 11, 2005 |
| This invention provides a DDR type zeolite membrane, characterized in that it is formed as a membrane on a substrate and its main component is silica, and that each single gas permeance at room temperature and 100.degree. C. are different, respectively among at least two types of gas |
| 6667265 |
Zeolite composite film and process for producing the same |
December 23, 2003 |
| A method for producing a zeolite composite membrane in which a zeolite membrane is formed on a porous substrate includes the steps of: coating a zeolite membrane on a porous substrate made of zeolite having the same or a similar composition as the zeolite membrane and containing the same |
| 5274618 |
Test apparatus for an optical recording disc |
December 28, 1993 |
| An optical recording disc on which an analog audio signal and a digital audio signal are recorded is tested. The analog audio signal results from FM-modulating 2-channel audio signals, and the digital audio signal results from modulating the same 2-channel audio signals in a digital |
