HHR mold is now owned by Atlantic Standard.

"A few more years and Langworthy bought out RT Plastics"
It was GGS that merged with RTP.

GGS owned Langhworthy.
Langworthy owned the HHR mold.
Wico bought out Langworthy.
Wico did produce some HHR's.
RTP actually made the crown molds that WICO sold.
Wico went bankrupt.
GGS merged with RTP.
AS wound up with HHR.