[3] Following E. C. Blackstone's death in late 1916 the business was sold to a new combine, Agricultural & General Engineers (AGE) group, but retained its identity and management.

An agreement had been reached with Massey-Harris of Canada to supply them all Blackstone's agricultural machinery marked with the brand name Massey-Harris-Blackstone.

[5] In 1988, General Electric Company plc merged its Paxman (engines), Ruston and Mirrlees Blackstone diesels businesses with the Alsthom division of Compagnie Générale d'Electricité (CGE) to form GEC-Alsthom.

In 2000, Alstom sold its diesel engine businesses (Ruston, Paxman, and Mirrlees Blackstone) to MAN Group.

The Stockport factory has been partly demolished and replaced with a new office and warehouse facility which still serves the aftermarket for spares and servicing of Lister Blackstone engines under the MAN Diesel & Turbo brand.

This was produced in large numbers and became a key product for the company - at the time of Frank Carter's death in 1934 there were over 100,000 of these engines in all parts of the world.

[3][10] In 1912 they developed a new internal combustion engine that ran on vaporising oil and was fired by a spark.

Blackstone supplied a number of diesel engines for British Rail locomotives but these were largely unsuccessful and were not adopted.