Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4770872 | Neutralizer for permanently waving hair | Du Y. Hsiung | 1988-09-13 |
| 4214596 | Permanent wave system using ammonium bisulfite prewrap | Julius F. Kaplan, Chester A. Davis | 1980-07-29 |