Signature verification pen

Details Signature verification pen Signature verification pen

1977-10-26

1978-12-26

Boudreau, Leo H.

Communications: electrical

Digital comparator systems

310311, G06K 900

Patent

active

041318803

ABSTRACT:
A pressure-sensitive writing stylus and associated circuitry for use in a personal identification system that uses handwriting pressure as an identifying discriminant. The stylus includes a housing, and a cartridge mounted within the housing. A capacitive transducer, preferably a piezoelectric crystal, is mounted contiguous with the upper end of the cartridge and is responsive to axial loading forces in the cartridge caused by contact of the cartridge tip against a writing surface. The transducer outputs a signal related to the time rate of change of the loading force or pressure. The associated circuitry receives the transducer output signal and amplifies and integrates it in successive stages to produce an output signal directly related to the user's handwriting pressure.

REFERENCES:
patent: 3528295 (1970-09-01), Johnson et al.
patent: 3621720 (1971-11-01), Clark
patent: 3805601 (1974-04-01), Jeffers
patent: 4035768 (1977-07-01), Boldridge, Jr. et al.
patent: 4078226 (1978-03-01), Eernisse et al.

Affiliated with

Also associated with

Rating

Signature verification pen does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Signature verification pen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signature verification pen will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1131100