Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4915288 | Envelope with single peel-off backing sheet to facilitate printing and copying | Kim Y. Kao, Stefan C. Wegdell | 1990-04-10 |
| 4913926 | Curl free ion deposition label printing | — | 1990-04-03 |
| 4898323 | Mailer for laser printer | Tien-Tsung Chen, C. Stefan Wegdell, Kim Y. Kao | 1990-02-06 |
| 4807805 | Dual envelope sheet-fed assembly | — | 1989-02-28 |