Table 2.

The International Patent Classification and Cooperative Patent Classification codes are used in the patent search.

Code	Meaning
International Patent Classification
A61B5/00	Measuring for diagnostic purposes radiation diagnosis by ultrasonic, sonic, or infrasonic waves. Identification of persons
A61B5/07	Endoradiosondes
A61B5/145	Measuring characteristics of blood in vivo, e.g., gas concentration, pH-value measuring of blood pressure or blood flow non-radiation detecting or locating of foreign bodies in blood
A61K9/00	Medicinal preparations characterized by special physical form
Cooperative Patent Classification
A61B5/073	Intestinal transmitters