013 Patent Control Information

Field definition and scope:

Field 013 contains information used to control patent documents. In addition to information about patents, this field may contain information relating to inventors' certificates, utility certificates, utility models, patents or certificates of addition, inventors' certificates of addition, utility certificates of addition, and published applications for any of these. Patent documents are assigned numbers and dates relative to the process of applying for and being granted legal rights to benefit from an invention or discovery. This field also includes information identifying the status of the patent document and country of source.

The field is repeated when more than one number is associated with a patent document.

The National level record requirement for this field is Optional.

Field 013 is repeatable.

Guidelines for applying content designators:

For indicator and subfield code definitions and examples, National-level (NLR) and Minimal-level (MLR) record requirements, and designator repeatability, see table below:

Position	Description	NLR	MLR	Repeatability
Field 013	Patent Control Information	O	O	R
Indicator:
First	Undefined; contains a blank	M
Second	Undefined; contains a blank	M

Subfield code:
$a	Number	A	O	NR
$b	Country	A	O	NR
$c	Type of number	A	O	NR
$d	Date	O	O	R
$e	Status information	O	O	R
$f	Party to document	A	O	R
$6	Linkage	A	O	NR
$8	Field link and sequence number	O	O	R