[yarddog]

My Great Grandfather invented the road grader. He filed the patent in 1901 and it was granted in 1902. The patent number was: US714325 A.

The patent was infringed but he could not afford to defend it.

He died when I was around 7 and I remember him well. I always called him “Grandpa Bill:.

[ETL]

"The first self-propelled grader was made in 1920 by the Russell Grader Manufacturing Company, which called it the Russell Motor Hi-Way Patrol. These early graders were created by adding the grader blade as an attachment to a generalist tractor unit.

After purchasing the company in 1928, Caterpillar went on to truly integrate the tractor and grader into one design—at the same time replacing crawler tracks with wheels to yield the first rubber-tire self-propelled grader, the Caterpillar Auto Patrol, released in 1931.[3]"

https://en.wikipedia.org/wiki/Grader#History