DiabolusInMusic
Functionless Art is Merely Tolerated Vandalism
It may be browser history dependent. Go to the base site Search Trademark Database | USPTO click Trademark Electronic Search System (TESS), then "Word and/or Design Mark (Structured)", then you should get a form that has a Search Term box and a Field pull-down menu allowing the Owner choice. I suggested doing it this way because otherwise you get a lot more chaff that has any random occurrence of Rickenbacker anywhere in the trademark application. It may not be as simple as Google, but the government did make this entire database available freely.
For example I was eventually able to get to this: Invalid Link Removed which, if it works, appears to be the Rick headstock (and if it doesn't, just try to find trademark number 75721968).
That link says Rickenbacker handed out some kind of legal suit in 2012. It doesn't give any more info other than that but it does give their attorney's information. I am sure he would love to explain it for $400/hour.