Title: Safety railway and car
Patent number: X6,611 1/2
Date granted: 6/13/1831
Notes: Entered as 6611 1/2X in Name & Date Patents. X patent numbers are from a group of patents that were destroyed in a fire at the U.S. Patent office in 1836. No image of this X patent is available.
View this patent at the USPTO.
Inventor: Alexander McGrew