This expression is used in several cases to express "habidas y por haber", as follows: "Each party acknowledges and agrees that the other party has made no statement or representation as to the size of the market for the products that may be made or sold utilizing the licenses granted or to be granted hereunder"..
"Based upon the foregoing, we are of the opinion that the shares issuable (i) under the 1999 Option Plan upon exercise of options granted and to be granted ..."
"to assign the full and unimpeded patent rights, previously granted and to be granted in. the future, in the SES, with Priority Claim Number 5059045/06 "

Todo lo habido y por haber: Expresión ponderativa que significa "todo lo imaginable".

Diccionario de María Moliner.

Quiere decir que vende, cede y traspasa con absolutamente todas las garantías que existen, que no queda ninguna afuera.

Espero que te sirva.

Aunque es cierto que es una expresion comun, al ser utilizada en un texto legal conviene traducirlo de la manera mas ajustada posible. Tal vez esto te sirva. :)