The IBM Technical Disclosure Bulletin
was a technical publication
produced by IBM
. The purpose of the Bulletin was to disclose inventions
that IBM did not want their competitors to get patents
on. The Bulletin was a form of defensive publication
. By publishing the details of how to make and use the invention, patent examiners
could have a searchable source of prior art
that they could cite against subsequent patent applications
filed by others on the same or similar inventions.
The Bulletin has been cited over 48,000 times in various US patents.