Dog names and owners are not usually ID'd on a Rabies tag. You'd probably only be able to track down the dog & owner thru the tag's issuing authority, i.e., veterinary practice, or municipality, and probably only for modern rabies tags (no more than 8-10 years old). I bet records would not be kept longer than that. Any veterinary employees here that can add to, confirm or refute this information ?
I have a 1949 tag issued by a national company(Pitman-Moore). It says:
PITMAN_MOORE
RABIES VACCINE
287049
1949
They are a huge Animal Health company, more than 100 years old and now part of Dow AgriSciences. So, no local vet or municipality could be tied to my tag, making it nearly impossible to ID the dog/owner, 70 years later.
Jim