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IN THE UNITED STATES PATENT AND TRADEMARK OFFICE 

Applicant: Bednorz ct al. Art Unit: 1 105 

Serial No.: 08/303,561 Examiner: D. McGinty 

Filed: September 9, 1994 Date: January 2, 1996 

For: NEW SUPERCONDUCTIVE COMPOUNDS HAVING HIGH 

TRANSITION TEMPERATURE, AND METHODS FOR THEIR 

USE AND PREPARATION 

AFFIDAVIT UNDER 37 C.F.R. £1.132 

The Commissioner of Patents and Trademarks 
Washington, D.C. 20231 

Sir: 

I, Chang C. Tsuei, being duly sworn, do hereby depose and state: 

That I received a B.S. degree in Mechanical Engineering from National Taiwan 
University (1960) and M.S. and PhD. degrees, in Material Science (1963, 1966) 
respectively from California Institute of Technology. 

That I have worked as a research staff member and manager in the physics of 
superconducting, amorphous and structured materials at the Thomas Watson 
Research Center of the International Business Machines Corporation in 
Yorktown Heights, New York, from 1973 to the present. (See attached Exhibit 
A for other professional employment history.) 

That I have worked in the fabrication of and characterization of high temper- 
ature superconductor and related materials from 1973 to the present. 

That I have reviewed the above-identified patent application and acknowledge 
that it represents the work of Bednorz and Mullcr, which is generally recognized 
as the first discovery of superconductivity above 26°K and that subsequent de- 
velopments in this field have been based on this work. 



YO987-074HY 



S.N. 303,561 




That all the high temperature superconductors which have been developed 
based on the work of Bednorz and Muller behave in a similar manner, conduct 
current in a similar manner and have similar magnetic properties. 

That once a person of skill in the art knows of a specific transition metal oxide 
composition which is superconducting above 26°K, such a person of skill in the 
art, using the techniques described in the above-identified patent application, 
which includes all known principles of ceramic fabrication, can make the tran- 
sition metal oxide compositions encompassed by claims 24-26, 86-90 and 96-108, 
without undue experimentation or without requiring ingenuity beyond that ex- 
pected of a person of skill in the art. This is why the work of Bednorz and 
Muller was reproduced so quickly after their discovery and why so much addi- 
tional work was done in this field within a short period of their discovery. 




Chang C. Tsuei 




Sworn to-before me this 26th day of September, 1995. 



Qualified In W'e^tch r: • CojntvAw 
Commission Expires Uwo.i 15, 19."/ 



DANIEL P. MORRIS 
NOTARY PUBLIC, StU-j -r New YcrK 

NO. 



YO987-074BY 



-2- 



S.N. 303,561 



CHANG C. TSUEI 



Education 

California Institute of Technology, M.S. (1963), Ph.D. (1966) 
National Taiwan University, B.S. (1960) 



Professional Employment 

1993-present - Research Staff Member 
1983-1993 - Manager, Physics of Structured Materials 
1979-1983 - Manager, Physics of Amorphous Materials 
1974-1975 - Acting Manager, Superconductivity 
1973-1979 - Research Staff Member 

Harvard University: 1980 (Summer) 
Visiting Scholar in Applied Physics 

Stanford University: 1982 (Sept.) - 1983 (April) 
Visiting Scholar in Applied Physics 

California Institute of Technology 

1972 - 1973 - Senior Research Associate in Applied Physics 
1969 - 1972 - Senior Research Fellow in Materials Science 
1966 - 1969 - Research Fellow in Materials Science 



EXHIBIT A