A silly question but is it the copyright of the original Battery designs that is of concern or the copyright of the scans.
If it's the scans contact someone like Michael Watterson he has scanned and cleaned up many Ever Ready and Vidor "nets"
I'm sure he would be happy to allow you use of his scans.
If its the original design you would need to ask Ever Ready.
Michaels web site
http://www.techtir.com/ seems to be offline at the moment however.
Cheers
Mike T