Title: Hinge
Patent number: 21,735
Date granted: 10/12/1858
View this patent at the USPTO.
Inventor: Mathias Bettinger
Inventor: August Boos
Title: Hinge
Patent number: 21,735
Date granted: 10/12/1858
View this patent at the USPTO.
Inventor: Mathias Bettinger
Inventor: August Boos