The USPTO has a nice searchable patent database (use "quick search" then search for "Assignee name" = Commodore). The list of results is sorted chronologically. start at the bottom and then go up the list.
The Query ( "Assignee name" = Commodore ) was unparseable (Missing boolean operator between expressions ).
Searching US Patents Text Collection...
Results of Search in US Patents Text Collection db for:
"Assignee name = Commodore": 0 patents.
No patents have matched your query
Hmmn...
