Patent · US Active

Coin and method for testing the coin

US9894966B2 · kind B2 · utility

1Cited by

24References

13Claims

0Family size

Assignee

Crane Payment Innovations, Inc. · US

Inventors

Klaus Meyer-Steffens · Fredenbeck, DE
Hans-Ulrich Cohrs · Homburg, DE
Wilfried Meyer · Buxtehude, DE

Key dates

Filing date	Jul 26, 2013
Grant date	Feb 20, 2018
Priority date	—
Expiry date	Jun 26, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/21
WIPO fieldControl
WIPO sectorInstruments

Abstract

A coin comprises a core made of a first metal, an outer ring surrounding the core concentrically and made of a further metal, and a central ring between the core and outer ring fixedly connected thereto. The central ring consists of an electrically insulating material. Further, the central ring is transparent to electromagnetic waves of a first wavelength range and is less transparent or not transparent to a second wavelength range. Methods for testing the coin are also described.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.