Index To The U S Patent Classification
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Handbook on the Use of the U.S. Patent Classification System
Author: United States. Patent and Trademark Office. Search and Information Resources
language: en
Publisher:
Release Date: 1997
IPC Green Inventory
Author: World Intellectual Property Organization
language: en
Publisher: WIPO
Release Date: 201?
This brochure explains how the IPC Green Inventory can give direct access to the latest patent information about technologies in a number of fields including alternative energy production, energy conservation, transportation, waste management, and agriculture and forestry