ELASTOMERIC INCLINOMETER

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BAROID CORPORATION

from CHASE MANHATTAN BANK, THE

RELEASED BY SECURED PARTY Recorded 1992-05-07

SPERRY-SUN, INC., A CORP. OF DE.

from SPERRY-SUN WELL SURVEYING COMPANY

CHANGE OF NAME Recorded 1989-06-15

SPERRY-SUN DRILLING SERVICES, INC.

from NL ACQUISTION CORPORATION, (CHANGED TO), NL SPERRY-SUN, INC., (CHANGED TO), SPERRY-SUN, INC., (CHANGED TO )

CHANGE OF NAME APRIL 24, 1981, JUNE 24, 1981 AND NOVEMBER 23, 1988 RESPECTIVELY Recorded 1989-06-15

BAROID TECHNOLOGY, INC., A CORP. OF DE.

from SPERRY-SUN DRILLING SERVICES, INC., A CORP. OF DE.

ASSIGNMENT OF ASSIGNORS INTEREST. Recorded 1989-06-15

CHASE MANHATTAN BANK (NATIONAL ASSOCIATION), THE

from BAROID CORPORATION, A CORP. OF DE.

SECURITY INTEREST Recorded 1989-03-08

SPERRY-SUN, INC.

from SPERRY-SUN WELL SURVEYING COMPANY

CERTIFICATE OF INCORPORATION TO RESTATE INCORPORATION, EFFECTIVE JULY 21, 1976 Recorded 1988-02-14

SPERRY-SUN DRILLING SERVICES, INC.

from NL SPERRY - SUN, INC.

CHANGE OF NAME (SEE RECORD FOR DETAILS) EFFECTIVE 10-19-81 , DELAWARE Recorded 1988-02-14

BAROID TECHNOLOGY, INC., 3000 NORTH SAM HOUSTON PARKWAY EAST A CORP. OF DE

from SPERRY-SUN DRILLING SERVICES, INC.

ASSIGNMENT OF ASSIGNORS INTEREST. Recorded 1988-02-14

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