K&F Manufacturing Corporation (Kauffman & Fender) was a company started by Clayton Orr Kauffman

Doc Kauffman

Doc Kauffman was Leo Fender's business partner in the K&F company, which they started in 1945. After Kauffman left, K&F became Fender. In the 1930's he was a chief designer of electric guitars for Rickenbacker.-References:...

 and Leo Fender

Leo Fender

Clarence Leonidas "Leo" Fender was an American inventor who founded Fender Electric Instrument Manufacturing Company, or "Fender" for short...

 in 1945. K&F manufactured amplifiers and electric lap steel guitars

Lap steel guitar

The lap steel guitar is a type of steel guitar, an instrument derived from and similar to the guitar. The player changes pitch by pressing a metal or glass bar against the strings instead of by pressing strings against the fingerboard....

. Very few of the K&F instruments have survived. The amps featured an 8" speaker with one input with a volume control or a 10" speaker with two inputs and controls for Volume and Tone. The amps were sprayed with a gray "crincle" finish with bare wood at the bottom where a bracket held the box during spraying. Kauffman left the company in February of 1946. The company then became Fender.