The Patent Date: box in the blue bar above allows dates to be entered in any of
the following formats:
- 1885-01-06
- 1 6 1885
- 01 06 1885
- 01/06/1885
- January 6, 1885
- Jan 6, 1885
- 1885 01 06
- 18850106
An underscore '_' can be used in the first format (the one with the dashes) to
match any single digit. An asterisk can be used to leave a field unspecified.
Example: 188_-*-06 would match any patent issued from 1880 through 1889 that was issued
on the sixth of any month.
YYYY DD MM (in upper or lowercase) can be used in any of the date format string as
wildcards in place of the year, date and/or month respectively.
- 1870-10-DD would show any patents from October 1870
- MM 11 1870 would show any patents issued on the eleventh day of any month in 1870.
- yyyy-10-11 would show any patents issued on October eleventh of any year.
A question mark can be used in any of the formats if you are unsure of a digit.
Example:
- DEC 17, 187?
- DEC 17, 18??
- DEC 17, 18?8
- 1885 01 0?
Enter a date in any of these formats above and press enter
to display the patent date search results here.
Alternatively you can use the old entry boxes if you chose:
Wildcards and digits are allowed in these boxes. The month names cannot be entered.
