I'm a researcher doing work in Information Retrieval. One of the papers I stumbled upon was this: Andrei Z. Broder, David Carmel, Michael Herscovici, Aya Soffer, Jason Y. Zien: Efficient query ...
I am researching the mechanical development of tools used by Fisheries in the Bristol Bay area. I'm in possession of a tool marked, "OKILL'S PATENT PRESSURE INDICATOR, NEW TYPE PATENT No. 144034. ...
When I researched the assignment history of a patent I found one assignment (from assignor A to assignee B) and a later assignment (from assignor B and C to assignee D). Where does C come from?