Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7449155 | Reactor cup shell-in-shell riser for reaction vessel used in hydroconversion of fossil fuels | Robert P. H. Chang | 2008-11-11 |
| 7448603 | Feedstream inlet sparger for reaction vessel used in hydroconversion of fossil fuels | Robert P. H. Chang | 2008-11-11 |
| 7370847 | Grid plate bubble cap for reaction vessel used in hydroconversion of fossil fuels | Robert P. H. Chang | 2008-05-13 |
| 7350962 | Liquid recycle inlet distributor assembly | Robert P. H. Chang | 2008-04-01 |
| 6960325 | Apparatus for hydrocracking and/or hydrogenating fossil fuels | Robert P. H. Chang | 2005-11-01 |
| 6235246 | Reactor having bellows expansion unit between catalyst addition/withdrawal conduit and grid plate | — | 2001-05-22 |
| 5963010 | Battery controller for controlling batteries of different kinds and including battery monitoring means for calculating remaining operation time and an information processing apparatus including such battery controller | Yoshihiro Hayashi, Satoshi Ozeki, Will Chen | 1999-10-05 |