When did Kurt Cobain invent the Fender Jag-stang?

Kurt Cobain invented the Fender Jag-Stang in 1994.   The Fender Jag-Stang is a hybrid guitar of a Fender Jaguar and a Fender Mustang.  Kurt Cobain had to have many adjustments on the guitar.  Kurt Cobain used the guitar in Nirvana's In Utero in 1994 shortly before his death.  Many owners say the guitar is a unique guitar.

http://en.wikipedia.org/wiki/Fender_Jag-Stang


Kurt Cobain with Fender Jag-Stang 1994