Chen, I have not seen official "databases"  like candy stores, just
ready for putting in a coin, and getting a ready solution out, but there
are many big sources for searching articles, books and litterature.
Example:

Chapman Hall / www.chaphall.com
MCB University Press / www.mcb.co.uk
Thomas Register of American Manufacturers and many, many  others.

Interesting to see what other answers you will get, Chen.
  
                            Regards / Ingemar