Mine Clearing rocket launcher T59 used to project T91 rocket. According to R.P. Hunnicutt, this project was terminated in August of 1945.
http://cgsc.cdmhost.com/cgi-bin/showfile.exe?CISOROOT=/p4013coll9&CISOPTR=163&filename=164.pdf
http://cgsc.cdmhost.com/cgi-bin/showfile.exe?CISOROOT=/p4013coll9&CISOPTR=163&filename=164.pdf