If the logo is registered as a trademark, you most certainly do have 
to have permission.

Penalty for a copyright violation is minor compared to trademark violations!

If your product 'compliments' theirs, or makes it more attractive to 
prospective users, the permission is nearly automatic. If your 
product competes with theirs, even indirectly, expect a cold response::>

Enjoy.

Art


At 01:53 PM 11/3/2006, you wrote:

>Hi,
>
>We have a couple of products that interface with telephone systems 
>such as nortel, meridian, siemens, etc. We have a specialized 
>version of each product for each system.
>Now we are redesigning our webpage, and we thought about using each 
>company's logo so users would quickly know which systems we support. 
>Do we have to contact each individual company and obtain permission 
>to use their logos or a disclaimer at the bottom of the page saying 
>that logos are property of their respective owners is enough?
>
>Cheers
>
>Padu
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