Okla. Stat. tit. 60, § 60-342: Principal part defined

That part is to be deemed the principal to which the other has

been united only for the use, ornament or completion of the former,

unless the latter is the more valuable and has been united without

the knowledge of its owner, who may in the latter case require it to

be separated and returned to him, although some injury should result

to the thing to which it has been united.