1982-12-30 to 1989-01-20
UNITED MARINE ELECTRONICS AND COMMUNICATIONS INC.
1983-02-10 to 1983-02-10
UNITED TELEPHONE COMPANY LTD.
1983-02-10 to 1986-05-06
LA COMPAGNIE DE TELEPHONE UNITED LTEE
1986-05-06 to 1986-05-06
UNITED TELEPHONE COMPANY LTD.
1989-01-20 to Present
165147 CANADA INC.