Title: Asphaltic paving or flag stones
Patent number: 40,651
Date granted: 11/17/1863
View this patent at the USPTO.
Inventor: Abraham Straub
Inventor: Isaac Straub
Title: Asphaltic paving or flag stones
Patent number: 40,651
Date granted: 11/17/1863
View this patent at the USPTO.
Inventor: Abraham Straub
Inventor: Isaac Straub