IP Library Granted Patent US 4,870,968
Granted Patent Utility
US 4,870,968 · App. 07/033,883

System and method for controlling the stimulation frequency of heart pacemakers

Inventors: Alexander Wiertzfeld, Roland Heinze
Patented Case View Patent ↗
Granted: Oct 3, 1989 Filed: Apr 2, 1987
Inventors
Alexander Wiertzfeld
Roland Heinze
Assignee (at issue)
Siemens Aktiengesellschaft

This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,870,968
App. No.
07/033,883
Filed
1987-04-02
Granted
1989-10-03
Kind
A