Butterfly-jewel Patent
| Type | Patent |
|---|---|
| Title | Butterfly-jewel |
| Inventor | William Dixon Denton |
| Inventor | Robert Winsford Denton |
| Extra | Cooperative Classification A44C17/02, A44C3/001; European Classification A44C3/00B |
| URL | http://www.google.com.au/patents/US897274 |
| Country | United States |
| Assignee | William Dixon Denton |
| Issue Date | 1908-09-01 |
| Filing Date | 1907-09-18 1907-09-18 |
| Patent Number | US897274 A |