Title: Railway switch
Patent number: 140,909
Date granted: 7/15/1873
View this patent at the USPTO.
Inventor: Medard Fels
Inventor: John Fels
Title: Railway switch
Patent number: 140,909
Date granted: 7/15/1873
View this patent at the USPTO.
Inventor: Medard Fels
Inventor: John Fels