Who's inventing what?  patents granted in the United States as reported in the Official Gazette of the United States Patent and Trademark Office  patents from January through March 1990 
Ellen Pare, editorial coordinator 
 - Detroit, Mich.  Gale Research Co.  1990 
 - x, 864 p. : ill. ; 28 cm. 
<br/><br/> issue 1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Patents--United States