450 



UNITED STATES PATENT AND TRADEMARK OFFICE 



CERTIFICATE OF CORRECTION 



PATENT NO. 



DATED 



INVENTOR(S) 



4,830,028 Page 2 of 2 



May 16, 1989 

 Lawson et al. 



It is certified that error appears in the above-identified patent and that said Letters Patent is hereby 

 corrected as shown below: 



Column lA, line 40, Claim 39, please delete "calm" and insert therefor 

 — claim — . 



Signed and Sealed this 

 Twenty-fourth Day of July, 1990 



Attest: 



HARRY F. MANBECK, JR. 

 Allesling Officer Commissioner of Faienis and Tmiltmarla 



