Author: Don Berger
Date: 2005-01-05 14:11
Hi Bob - Yes it is a US patent, your # is correct, but needs commas, not dashes for retrieval 3,618,440, well expired, also before 1976 so is not readily viewed. The easiest way is to go to USPTO, databases, patent quick search, Ratterree AND ligature, which brings up the 7 patents in which it is cited as prior art [similar, later pats]. Then click on the #, which brings it up from the old file, where you can read [and copy print, maybe not pics]. Of course, you have LOTS of help already, but thot you might like to know my routine. Congrats and luck, Don
Thanx, Mark, Don
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