THERMO INSTRUMENT SYSTEMS INC

Q: Apr 1 2000

FY: Jan 1 2000

FY: Jan 1 2000

Q: Oct 2 1999

Q: Jul 3 1999

Q: Apr 3 1999

FY: Jan 2 1999

Q: Oct 3 1998

Q: Jul 4 1998

Q: Apr 4 1998

FY: Jan 3 1998

Q: Sep 27 1997

Q: Jun 28 1997

Q: Mar 29 1997

FY: Dec 28 1996

FY: Dec 28 1996

Q: Sep 28 1996

Q: Sep 6 1996

Q: Aug 7 1996

Q: May 8 1996

5,7

5,7

5,7

5,7

5,7

5,7

5,7

5,7

5,7

5,7

5

5,7

5,7

2,7

2,7

5,7

5,7

5

Current report pursuant to Section 13 or 15(d) (amendment)

Current report pursuant to Section 13 or 15(d)

Written communication about a business combination transaction (Rule 425)

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

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

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

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Registration of Securities on Exchange (amendment)

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

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

Prospectus Supplement for Primary Offering

Registration of Securities on Exchange

Registration statement under Securities Act of 1933

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Registration statement under Securities Act of 1933

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Preliminary Proxy Statement

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

THERMO ELECTRON CORP

THERMO ELECTRON CORP

THERMO ELECTRON CORP

THERMO ELECTRON CORP

THERMO ELECTRON CORP

THERMO INSTRUMENT SYSTEMS INC

THERMO INSTRUMENT SYSTEMS INC

THERMO INSTRUMENT SYSTEMS INC

THERMO INSTRUMENT SYSTEMS INC

THERMO INSTRUMENT SYSTEMS INC

THERMO INSTRUMENT SYSTEMS INC

THERMO INSTRUMENT SYSTEMS INC

THERMO INSTRUMENT SYSTEMS INC

THERMO INSTRUMENT SYSTEMS INC

THERMO INSTRUMENT SYSTEMS INC

THERMO INSTRUMENT SYSTEMS INC

THERMO ELECTRON CORP

THERMO INSTRUMENT SYSTEMS INC

THERMO INSTRUMENT SYSTEMS INC

THERMO INSTRUMENT SYSTEMS INC

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