* Rivals had charged patent infringement
* Companies decline to comment on terms of settlement (Adds confirmation from Pratt & Whitney)
LONDON, July 19 (Reuters) - Britain's Rolls-Royce (RR.L) and U.S. rival Pratt & Whitney have settled a legal dispute over patents on jet engines, in a case that threatened to delay deliveries of Boeing Co's (BA.N) new 787 aircraft.
Rolls and P&W, which is owned by United Technologies Corp (UTX.N), said on Tuesday they dropped lawsuits against each other over disputes surrounding Rolls' Trent 900 and 1000 engines and the GP7200 engine, developed by P&W and General Electric (GE.N).
"We have reached an amicable, confidential settlement agreement resulting in dismissal of all patent litigation between the parties," a Rolls-Royce spokesman told Reuters.
Pratt spokeswoman Katy Padgett confirmed the settlement but declined to elaborate.
P&W last year accused Rolls of copying turbine blade technology used on its Trent 900 and 1000 engines. Pratt also asked the U.S. International Trade Commission to block Boeing from importing the Trent 1000, which powers its new 787 Dreamliner jet.
Another lawsuit centered on a patent dispute over P&W and GE's GP7200 engine.
Rolls and P&W are part of the International Aero Engines alliance -- a joint venture including Germany's MTU and Japanese Aero Engines -- to produce the V2500 turbofan. (Reporting by Rhys Jones in London, additional reporting by Scott Malone in Boston; editing by Matt Scuffham and Derek Caney)