03943915 is referenced by 85 patents and cites 4 patents.

A fluid pressure sensor for use internal to the human body including a completely ceramic sectioned outer shell having an opening therein for allowing fluid access to a thin metal diaphragm member. The thin metal diaphragm member is disposed between the sectioned outer shell by diffusion bonding in order to limit exposure of the human tissue solely to the diaphragm member and the ceramic shell. A variable tuned LC circuit is responsive to fluid pressure for establishing a predetermined electrical parameter. The electrical parameter is capable of affecting an electromagnetically responsive electrical circuit means located external to the human body for providing data indicative of the fluid pressure. The thin diaphragm member constitutes one plate of the LC circuit and the remainder of the LC circuit is located beneath the thin diaphragm member so as to be protected from fluid and moisture.

Title
Intracranial pressure sensing device
Application Number
5/528118
Publication Number
3943915
Application Date
November 29, 1974
Publication Date
March 16, 1976
Inventor
Gerald R Severson
Scottsdale
AZ, US
Agent
Kenneth R Stevens
Harry M Weiss
Assignee
Motorola
IL, US
IPC
A61B 5/07
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