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Boolean Text Search Type the words or phrases you want to search in one or both text entry areas. Select the patent fields to be searched with the selector to the left of each entry area. When using both fields, choose the boolean connector (OR, AND, or AND NOT). You can get the field definitions or you can view an example query.   1995-present     1971-present   Assignee Any Field Inventor Title Abstract Claims Agent     And Or And Not   Any Field Inventor Assignee Title Abstract Claims Agent     Maximum results    20 50 100 200 600       Patent Number Search |  Advanced Text Search Home |  Help |  Search |  Order Form |  Guestbook |  Legal  |  IBM