Stored-value card with whistle
US7234639B2 · kind B2 · utility
13Cited by
13References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2005 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Dec 28, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K5/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A stored-value card includes a housing and at least one internal wall substantially enclosed within the housing. The housing includes an account identifier signifying a financial account or record linked to the stored-value card. The at least one internal wall is configured to define an airflow chamber within the housing. The housing defines an opening leading into the airflow chamber. The stored-value card is configured to produce a whistle sound when air enters the airflow chamber from the opening and moves within the airflow chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.