Padlock Patent — Combo
Inventor: Alfred Conrad R Johnsdorf
View on USPTO / Google Patents ↗| Patent Number | 1253249 |
|---|---|
| Issue Date | 1917-07-25 |
| Inventor | Alfred Conrad R Johnsdorf |
| Patent Type | Combo |
| External Link | https://patents.google.com/patent/US1253249/en ↗ |
