Football is not patented. The rules are readily available and anyone can play. Many items related to football have copyrights, such as the rule books, team names and recordings of games.
1916
If it is a U.S. patent, you can go to the USPTO website for patent searches and enter the number in "patent number search".
Talk to a patent lawyer. He/she will have the knowledge on how to patent the game. I have provided a link. But I would still highly recommend seeing the patent lawyer.
Patent pending is a warning that a patent application has been filed. It is completely worthless until and unless a patent is actually issued for that invention. Patent number notice means a patent with that number was issued for the invention that is implemented in the product labeled with that number.
There is no specific patent number for the mailbox.
the patent number is 5209584
A patent number is the code that helps identify an invention.
60 Minutes
It is a football game which involves a number of players.
The US patent number is US 7198789 B2.
You communicate with the Patent Office.
There is no US patent 555408021. There is also no US patent 55408021.