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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Page from a legal agreement outlining terms for sub-licensees, patents, royalties, and potential infringements.

Identifier  ExFiles\Box 133\3\  scan0155
Date  1st January 1940 guessed
  
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Sub-Licensees, and shall have affixed thereto ina
permanent manner a Licence Plate in a form approved by
Armstrongs.

8. THE parties hereto of the first four parts agree not
to grant Licences to any other persons firm or companies in
Great Britain and Ireland to manufacture engines of the
types and for the uses stipulated in this Licence on more
advantageous terms than those herein contained without at
the same time placing the Licensees upon a similar footing.

9. IF any Letters Patent covering any part of the
Kadenacy System incorporated in any engines manufactured
by the Licensees under the terms of this Licence or any
claim thereto shall be declared by any Court of competent
jurisdiction to be invalid thus enabling other persons to
manufacture in Great Britain and Ireland a heavy oil direct
injection compression ignition engine of the types and for
the uses stipulated in this Licence with the same
essential elements and possessing an equal degree of
efficiency with engines manufactured by the Licensees
embodying that part of the Kadenacy System covered by the
said Letters Patent the Licensees' obligation to pay
royalties hereunder for any period thereafter shall cease
so far as the particular type of engine effected is
concerned but if the decision of the Court of authority
making such declaration or refusal shall be reversed on
Appeal this Licence shall revive and the said royalties shall
forthwith again become payable together with all royalties which
would have been payable but for the adverse decision.

10. THE Licensees shall give notice to Armstrongs of any
apparent infringement which comes to their notice, and if
the infringement is of a material nature, the matter shall
be referred to a leading Patent Counsel or Lawyer to be
selected by Armstrongs, and if he shall advise that in his
opinion an infrigement of a valid patent has been committed
  
  


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