OCR Plant Patent Searches

Search the ocr'ed plant patents. From PP1 issued 1931-08-18 through PP3986 issued 1976-11-30.

Inclusion words - must be present

Exclusion words - must not be present

Favorable words - rows containing these words will appear before rows without these words when sorted by relevance.

Sort by patent number relevance

Or return just patent number

The searches are case insensitive (ex: a search for Marshmallow will give the same results as searches for marshmallow or marshMallow).
Tip: the favorable words box could contain special punctuation characters as explained here. Also note that words of three or fewer characters are not indexed. There is also this list of stopwords that don't get indexed. Searching for words of three characters or less or for stopwords will not match anything in the database. Additionally, words appearing in 50% or more of the ocr'ed patents are not indexed. Words like Patent or phrases like 'Patent Office' would not be searchable. These are limitations of MySQL, the underlying free database used here.