. . and the reason for there being no name on the card (sound cards and modems are the worst offenders) is that they are built for private branding. Sometimes the customer doesn't want to bother branding it so they just use the generic manual.
The only way to find the real manufacturer is through the FCC ID. There's a link on my [link|http://www.aaxnet.com/info/links.html|Links page].