Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Reexamination Certificate
2007-08-28
2007-08-28
Benson, Walter (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
C235S451000
Reexamination Certificate
active
11431704
ABSTRACT:
The invention relates to a method of examining the authenticity of a document provided with an optico-diffractively effective element or hologram by subjecting the hologram to capacitive coupling of a voltage and deriving a signal representative of the voltage for comparison with a reference signal representative of a hologram of an authentic document.The method may be improved by providing, between individual segments of the hologram, additional security indicia providing a signal in response to being irradiated by electromagnetic radiation of a predetermined frequency.
REFERENCES:
patent: 3485358 (1969-12-01), Hooker
patent: 3530281 (1970-09-01), Smeiman
patent: 3800155 (1974-03-01), Potenza
patent: 4114032 (1978-09-01), Brosow et al.
patent: 4211918 (1980-07-01), Nyfeler
patent: 4255652 (1981-03-01), Weber
patent: 4355300 (1982-10-01), Weber
patent: 4568141 (1986-02-01), Antes
patent: 4897300 (1990-01-01), Boehm
patent: 4913504 (1990-04-01), Gallagher
patent: 4933120 (1990-06-01), D'Amato et al.
patent: 4941687 (1990-07-01), Crane
patent: 4984824 (1991-01-01), Antes et al.
patent: 5003915 (1991-04-01), D'Amato et al.
patent: 5093184 (1992-03-01), Edwards
patent: 5388862 (1995-02-01), Edwards
patent: 5403040 (1995-04-01), Mowry, Jr. et al.
patent: 6133742 (2000-10-01), Bridges et al.
patent: 6165592 (2000-12-01), Berger et al.
patent: 0 097 570 (1987-09-01), None
patent: 0 338 378 (1998-10-01), None
Benson Walter
Dole Timothy J
Neifeld IP Law PC
WHD Electronische Prueftechnik
LandOfFree
Method of testing documents provided with... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of testing documents provided with..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of testing documents provided with... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3899980