This inventor holds 6 USPTO granted patents. Top assignees: Unisys Corporation, Other. Active years: 1988-2001.
Location History:
- Coatesville, PA (US) (1988 - 1998)
- Sea Isle, NJ (US) (1997 - 2001)
Company Filing History:

Years Active: 1988-2001
Title: Innovations by John A Keller
Introduction
John A Keller is an inventive mind based in Sea Isle, NJ (US). He has made significant contributions to the field of technology, particularly in the area of credit card security. With a total of 6 patents to his name, Keller's work reflects a commitment to enhancing user safety and convenience.
Latest Patents
Keller's latest patents include a "Method and apparatus for credit card maintenance" and a "Security improved card." The security improved credit, debit, pass, or cash card is designed as a colorless and transparent semirigid plastic card member with non-reflective faces. This innovative card has no permanent imprinting to visually identify an issuer, owner, or card number. Instead, it features temporary identification that can be removed by the owner and can only be visually read when backed by an opaque sheet. Additionally, the card includes a bending line across its face, which is a slit with a hinge of flexible plastic film attached over it. An opening cut through the card allows a person's fingernail to engage it, facilitating easy access from a wallet or attachment to a shirt button.
Career Highlights
Throughout his career, John A Keller has focused on developing solutions that address real-world problems. His innovative approach has led to advancements in the security of financial transactions, making them safer for consumers.
Collaborations
[This section has been skipped due to space constraints.]
Conclusion
John A Keller's contributions to the field of credit card technology demonstrate his dedication to innovation and user safety. His patents reflect a forward-thinking approach that is essential in today's digital age.