I realize this is a legal question but has anyone here had this happen.
Any advice?

1. Bought a house, as is, in 2010, which came with a 1,000 gallon propane tank attached.
2. Entered into agreement with fuel company "1" for fuel in 2010.
3. No tank rental is paid to fuel company 1 because it's not their tank
4. Recently a workman (inspecting the tank because of a new BBQ) mentioned that company 2 owns the tank
5. Company 2 was recently bought by company 1.

Nothing more has happened, but, who owns that tank?

I feel "I" own it by virtue of multiple circumstances (but I'm not a lawyer!):
a. I bought the house and everything attached to it
b. I never signed an agreement with company 2
c. Company 2 abandoned that tank long ago (IMHO)

I suspect, if company 1 wants to assert ownership of that tank, they could say:
A. Company 2 originally owned the tank
B. Company 2 still owns that tank
C. Therefore, company 1 (who owns company 2) owns that tank.

Have you ever been in this situation?
What advice do you have for me?

TIA