Title: Curvilinear blind opener and shutter
Patent number: 6,347
Date granted: 4/17/1849
View this patent at the USPTO.
Inventor: Robt. Rollf
Title: Curvilinear blind opener and shutter
Patent number: 6,347
Date granted: 4/17/1849
View this patent at the USPTO.
Inventor: Robt. Rollf