O'Dell, Tom H. <br/><br/>
Inventions and official secrecy  a history of secret patents in the United Kingdom 
T. H. O'Dell 
 - Oxford  Clarendon Press  1994 
 - 149 p. : ill. ; 23 cm. 
<br/><br/><label>ISBN: </label>0198259425  RM113.30 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Patent laws and legislations--United Kingdom--History<br/>Inventions--United Kingdom<br/>Official secrets--United Kingdom