Location History:
- Prior Lake, MN (US) (1982 - 1988)
- Park Forest, IL (US) (1990)
- Lemont, IL (US) (1995 - 1997)
Company Filing History:
2 out of 95 
3 out of 832,880 Years Active: 1982-1997
Title: Innovations by Richard H Johnson
Introduction
Richard H Johnson is an accomplished inventor based in Prior Lake, MN (US). He holds a total of 6 patents that showcase his innovative contributions to document verification technologies. His work primarily focuses on creating systems that enhance the authenticity of important documents.
Latest Patents
One of Johnson's notable patents is the "Verification method using pressure and heat-sensitive chromogenic system." This invention involves a pressure and heat-sensitive composition that includes chromogen-containing pressure-rupturable microcapsules and a heat-sensitive color developer. It is designed for use in verification systems applied as localized coatings on documents such as checks and prescriptions. By striking the chromogenic composition with a fingernail or blunt object, pressure and heat are generated, producing a colored image through friction. The composition has a fugitive characteristic, allowing the colored image to gradually disappear and reappear when subjected to external pressure and heat. This feature enables repeated verification of document authenticity.
Another significant patent is the "Document with heat and pressure sensitive chromogenic composition," which shares similar characteristics and applications as the previous invention. This innovative approach to document verification enhances security and trust in important transactions.
Career Highlights
Throughout his career, Richard H Johnson has worked with various companies, including Wallace Computer Services, Inc. His experience in the field has contributed to his expertise in developing advanced verification technologies.
Collaborations
Johnson has collaborated with notable individuals in his field, including his coworker John C Chang. Their combined efforts have led to significant advancements in document verification systems.
Conclusion
Richard H Johnson's innovative patents and career achievements highlight his dedication to enhancing document security through advanced technologies. His work continues to influence the field of document verification, ensuring authenticity in critical transactions.