Changes

Reel and frame give the location on the microfilm files where the particular transaction is recorded. The reel number and frame number are unique to a transaction between the assignee and assignor. The recdate is the date the assignment was recorded. Patent is the patent number assigned. The names of each assignee and assignor involved in the assignment are given in the table. The table has a composite key consisting of reel number, frame number, and recdate.

==Current Problems==