| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 6 | |
| #2 | United States | 3 | |
| #3 | United Kingdom | 2 | |
| #4 | Belgium | 1 | |
| #5 | Switzerland | 1 | |
| #6 | France | 1 | |
| #7 | Italy | 1 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Textiles and paper | |
| #3 | Machines | |
| #4 | Pharmaceuticals |
| # | Technology | |
|---|---|---|
| #1 | Printing processes | |
| #2 | Pigments | |
| #3 | Unspecified technologies | |
| #4 | Medical preparations | |
| #5 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Yahagi Masakichi | 9 |
| #2 | Orita Michio | 5 |
| #3 | Suzuki Teruo | 3 |
| #4 | Igaki Tetsuo | 3 |
| #5 | Horiuchi Shoichi | 3 |
| #6 | Tohyama Takafumi | 2 |
| #7 | Enomoto Chohji | 2 |
| #8 | Obitu Takeo | 2 |
| #9 | Tanino Hiroshi | 1 |
| #10 | Sawada Kensaku | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1359422A | Fluoran compounds and their use in recording | |
| US3642514A | Pressure-sensitive copying sheet utilizing stabilized crystal violet lactone, method of making and method of making composition | |
| US3649649A | Fluoran derivatives and preparation thereof | |
| US3442908A | 6-dialkylaminofluorans |