Q: How i can see between 1934 and 1944 ?
I am searching a Patent of the Philips company
My email : info@yellowagro.com
A:
The USPTO search tool allows you to search text in patents back to 1976. The USPTO assignment database goes back to 1980. I do not know a free tool that goes back to the 1930s.
You may want to contact a reference librarian at a college near you. You may want to start by calling the nearest college that holds the patent collection and has special tools for searching https://www.uspto.gov/learning-and-resources/support-centers/patent-and-trademark-resource-centers-ptrcs
Sorry I could not be of more help.
Kevin E Flynn
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