DE2722982C2
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Circuit arrangement for an ultrasonic burglar alarm system that works according to the Doppler principle
Assignee: Siemens AG
•
Filing: 1977-05-20
•
Granted: 1979-04-26
•
Expires: 1997-05-20
Abstract
No abstract record available.
Inventors
- 👤 Peter Dipl.-Phys. 8000 Muenchen Kleinschmidt
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-28 22:16
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/02; G01S15/50; G01S15/58
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.