Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5053051 | Means and method for the oxidative dyeing, especially the redyeing, of living hair: micro-encapsulated acid | Jurgen Tennigkeit, Hirotsugu Segawa | 1991-10-01 |
| 5006127 | Agent for the oxidative dyeing of hair, method for the preparation of the agent and use of the agent | Jurgen Tennigkeit | 1991-04-09 |
| 4992077 | Agent for the oxidative dyeing of hair, method for the preparation of the agent and use of the agent | Jurgen Tennigkeit | 1991-02-12 |
| 4776856 | Process and means for oxidized dyeing of hair using a manganese dioxide catalyst | Jurgen Tennigkeit | 1988-10-11 |