This inventor holds 5 USPTO granted patents and 2 published patent applications and 6 EPO patents. Top assignees: Siemens Aktiengesellschaft, Siemens Gebaudesicherheit Gmbh & Co. Ohg. Active years: 1981-2009.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:

Years Active: 1981-2009
Title: Karlheinz Schreyer: Radio-System and Safety-Alarm Inventions.
Introduction
Karlheinz Schreyer is an inventor associated with Wolfratshausen, Germany. His work includes radio communication methods designed for safety and alarm systems. He is credited with 5 patents.
Latest Patents
Schreyer’s listed patents include “Method of Radio Transmission in a Danger Alarm System.” The invention describes a battery-saving radio method that uses repeaters and cyclically activated receivers. Devices transmit a preamble that helps intended recipients determine whether to remain active and when to wake again to receive the data telegram.
Another listed invention is “Procedure for Registering a New Subscriber in a Radio System Through Routers.” In this method, a new subscriber searches for reachable participants, selects a router, and sends a registration request to a central system. If the request is accepted, the central system returns a subscriber number and system identifier, allowing the new device to join the radio network.
Career Highlights
Schreyer’s listed company affiliations include Siemens Aktiengesellschaft and Siemens Gebäudesicherheit GmbH & Co. OHG. The patent descriptions reflect work on radio networking and energy-efficient communication for danger-alarm systems.
Collaborations
His listed collaborators include Werner Schropp and Karla Oberstein.
Conclusion
Karlheinz Schreyer’s patent work focuses on practical radio-system technologies, including energy-conscious alarm transmission and router-assisted registration of new subscribers.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile