Back to The Emergence of Tissue Engineering as a Research Field

Bibliometric Analysis of Core Papers Fundamental to Tissue Engineering

Appendix 2 - Patent filter used in USPTO system (09/26/01)

International patent subclasses used as a broad screen:
A61F or A61L or C12M or C12N or C12P

====== AND any of the following title/abstract/claim words (* is a wildcard) ======

(all tissue types)

====== AND any of the following title/abstract/claim words ======

(core technology is to grow 3D tissue)
scaffold*
three adj dimens* (adj means adjacent words same order)
3D
(grow* or cultur*) near5 (matri* or foam)(near5 means within 5 words either dir)

====== AND NOT any of the following title/abstract/claim words ======

(to kick out drug delivery, etc.)
artific*
controlled
delivery
drug*
release
sustained

=============OR===============

IPCs listed above ANDED with
tissue near2 engineer*

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