There is none. The pipe organ was not invented. It developed in ancient times. However, there are thousands of patents concerning pipe organ parts.
The pipe organ is a keyboard instrument.
The pipe organ was invented by the Greek Ctesibius.
The instruments most similar to a pipe organ are:Flute (pipe organ has flute pipes of different lengths)Harmonium
Organ pipe coral was created in 1758.
Organ pipe cacti make no noise.
The keyboard instrument with pipes would be the humble pipe organ.
Organ pipe mud dauber was created in 1773.
Moe Pipe Organ Company was created in 1991.
Peragallo Pipe Organ Company was created in 1918.
The first pipe organ, called the hydraulis, was invented in Greece.
His main instrument was the pipe organ. He also played the harpsichord.
It could be anything. It depends on the particular organ. The largest pipe or the largest rank? Read the Wikipedia article on pipe organ and get your terminology straightened out.