Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7198422 | Flexible strap ring binder | Hung Yu Cheng | 2007-04-03 |
| 7073968 | Fastening binder ring mechanisms to binders | Chun Yuen To | 2006-07-11 |
| D466153 | Ring binder mechanism fastener | Chun Yuen To | 2002-11-26 |
| D461498 | Ring binder mechanism fastener | Chun Yuen To | 2002-08-13 |
| 6217247 | Ring binder mechanism | — | 2001-04-17 |
| 6146042 | Sheet retaining device and method of packaging sheet retaining devices | Chun On To | 2000-11-14 |
| 6109813 | Ring binder with divided housings | Chun On To | 2000-08-29 |
| 6033144 | Ring binder mechanism | Chun Yuen To | 2000-03-07 |
| 6007266 | Fastener for a ring binder and method of producing a binder assembly | Hung Yu Cheng, Chun Yuen To | 1999-12-28 |
| 5924811 | Assembling and disassembling device for ring binders | Chun Yuen To, Chun On To, Kung-Hua CHENG, Wen Xu | 1999-07-20 |
| 5393155 | Ring binder housing | — | 1995-02-28 |