Can anyone help me find who and when the first micrometer scope mounts as Unertl, Fecker, Pope Etc. was made? And is the any patent on these types of mounts?

I have tried in the book "Old Gunsights & Rifle Scopes" and the earliest I could find was Pope Year 1900, in pope's 1899 catalog it seems like he uses similar mounts, Stevens had them in 1902.

Michael