- The database was last updated on: 2023-09-21
- Bibliographic Databases such as Titles, Names and Classifications are searchable from 1869.
- Text Databases such as Abstract and Claims are searchable from 1978-08-15.
- The Issue date is searchable from 1869.
- The Filing date is searchable from 1978-08-15.
- The Priority date is searchable from 1989-10-01.
- Images are available from 1869-01-01 except for Cover page and Abstract which are available from 1975.
This site continually strives to maintain accurate and current data. However, sometimes problems occur. Please see the