FI95418B - Sensor for determining that a security is genuine - Google Patents
Sensor for determining that a security is genuineInfo
- Publication number
- FI95418B FI95418B FI904392A FI904392A FI95418B FI 95418 B FI95418 B FI 95418B FI 904392 A FI904392 A FI 904392A FI 904392 A FI904392 A FI 904392A FI 95418 B FI95418 B FI 95418B
- Authority
- FI
- Finland
- Prior art keywords
- genuine
- sensor
- security
- determining
- watermark
- Prior art date
Links
Landscapes
- Inspection Of Paper Currency And Valuable Securities (AREA)
- Image Processing (AREA)
Abstract
Method and device for automatically verifying that a note or document which comprises a watermark is genuine. A capacitive sensor device 4, 6, 7 is used which is divided into two and double-acting. A symmetry characteristic of the sensor output signal is changed in a predetermined way when a correct watermark is present in a coinciding position with condenser electrodes 4, 6 of a suitable shape. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI904392A FI95418C (en) | 1988-03-10 | 1990-09-06 | Sensor used to verify the authenticity of the security paper |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO881060A NO165697C (en) | 1988-03-10 | 1988-03-10 | SENSOR FOR AUTHENTICITY OF SECURITY PAPER. |
NO881060 | 1988-03-10 | ||
PCT/FI1989/000043 WO1989008898A1 (en) | 1988-03-10 | 1989-03-10 | Sensor for verification of genuineness of security paper |
FI8900043 | 1989-03-10 | ||
FI904392A FI95418C (en) | 1988-03-10 | 1990-09-06 | Sensor used to verify the authenticity of the security paper |
FI904392 | 1990-09-06 |
Publications (3)
Publication Number | Publication Date |
---|---|
FI904392A0 FI904392A0 (en) | 1990-09-06 |
FI95418B true FI95418B (en) | 1995-10-13 |
FI95418C FI95418C (en) | 1996-01-25 |
Family
ID=26158808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI904392A FI95418C (en) | 1988-03-10 | 1990-09-06 | Sensor used to verify the authenticity of the security paper |
Country Status (1)
Country | Link |
---|---|
FI (1) | FI95418C (en) |
-
1990
- 1990-09-06 FI FI904392A patent/FI95418C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI95418C (en) | 1996-01-25 |
FI904392A0 (en) | 1990-09-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
BB | Publication of examined application | ||
MM | Patent lapsed |
Owner name: DATALAB OY |