Over here you will find free vector brand logos in Illustrator, EPS, Corel Draw format..

Brand Vector Logos start with 'I' letter

Integralzrt 70
Industrial Solutions
ImTraff Consultoria e Engenharia
Illumina
Instituto Florence
Integra Home Theater
Instagram
International Divind Assosiation IDA
iFacilty
IVAS
Imcruz