Patent US4814648A successfully refreshed from Google Patents.
Patent DE441583C successfully refreshed from Google Patents.
DE441583C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Piezo-electric vibration generator
Assignee: General Electric Co
•
Filing: —
•
Granted: 1927-03-07
•
Expires: 1944-03-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-04 09:59
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/15; H03H9/17
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.