1982 - present, updates every other month. 1972 - present. All U.S. patents issued since 1790, in the form of searchable patent numbers and current U.S. classifications hyperlinked to full-page images of each page of each patent.
Full text is available for many of the articles.
Fields covered include aesthetics, political philosophy, ethics, epistemology, social philosophy, and logic. Manifests of the vessels loading cargo at 120 U.S. continental seaports. Current 18 months. Manifests of vessels discharging international cargo at 62 U.S. seaports. Current 18 months.