TREX MEDICAL CORP

Q: Jul 1 2000

Q: Apr 1 2000

Q: Jan 1 2000

FY: Oct 2 1999

FY: Oct 2 1999

Q: Jul 3 1999

Q: Apr 3 1999

FY: Oct 3 1998

Q: Jan 2 1999

FY: Oct 3 1998

FY: Oct 3 1998

Q: Jul 4 1998

Q: Apr 4 1998

Q: Jan 3 1998

FY: Sep 27 1997

Q: Jun 28 1997

Q: Mar 29 1997

FY: Sep 28 1996

Q: Dec 28 1996

FY: Jan 24 1997

2,7

5,7

5,7

5,7

5,7

5,7

Certification of termination of registration of a class of securities (Section 12(b))

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration of Securities on Exchange (amendment)

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Post-effective amendment to a registration statement

Post-effective amendment to a registration statement

Amended Initial Registration Statement

Prospectus Supplement with Pricing Information

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

THERMO ELECTRON CORP

TREX MEDICAL CORP

THERMO ELECTRON CORP

TREX MEDICAL CORP

THERMO ELECTRON CORP

THERMO ELECTRON CORP

THERMO ELECTRON CORP

TREX MEDICAL CORP

THERMO ELECTRON CORP

THERMO ELECTRON CORP

THERMO ELECTRON CORP

THERMO ELECTRON CORP