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Copyright Statement |
SilverPlatter Guides PN Patent Number
us in pn 2279954 in pn 22.11.94 in pn 22.11.1999 in pn
The PN field contains the patent serial number, the two-letter patent country code, and the exact publication date. Publication dates cited contain a four-digit year (DDMMYYYY) in records added to the database from September, 1999 forward, and a two-digit year (DDMMYY) in records added prior to that date.
You can search for any of these items in the format shown above. If the code you are searching for is a stopword, append a hyphen to the term, such as is- in pn.
Note: For comprehensive retrieval of publication dates cited in 1999, include both the two-digit and four-digit formats in your search.
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