This inventor holds 5 USPTO granted patents. Top assignees: Ameritech Corporation, At&t Intellectual Property I, LP, At&t Knowledge Ventures, LP. Active years: 2001-2011.
Company Filing History:
2 out of 159 
1 out of 16,744 
1 out of 75 
Years Active: 2001-2011
Title: Douglas Marshall: Innovator in Telecommunications
Introduction
Douglas Marshall is a notable inventor based in Round Lake, IL (US). He has made significant contributions to the field of telecommunications, holding a total of 5 patents. His work focuses on enhancing call processing systems and providing valuable call management solutions.
Latest Patents
One of his latest patents is for a system titled "Calling-party-pays call processing for cellular and paging." This invention introduces an enhanced Calling Party Pays (CPP) or Paging Party Pays (PPP) system that allows for billing of calls from traditionally non-billable sources. It also enables routing of incoming calls to voicemail if the caller opts not to incur additional charges. Furthermore, it allows the caller to complete the call and charge the cellular or paging subscriber for extra air-time usage by entering a PIN or security code, known as a billing override code. Additionally, the system provides the option for callers to block CPP/PPP charges from being billed to them. Another significant patent is related to "Call management reports." This invention provides a service for generating call reports for subscribers regarding non-answered calls. By utilizing telecommunications switch triggers, it collects call status information related to answered, busy, and unanswered calls, which is then formatted into a report suitable for presentation to the subscriber.
Career Highlights
Throughout his career, Douglas Marshall has worked with prominent companies in the telecommunications industry, including Ameritech Corporation and AT&T Intellectual Property I, LP. His experience in these organizations has contributed to his expertise and innovative capabilities in the field.
Collaborations
Douglas has collaborated with several professionals in his field, including Carol Shifrin Gruchala and Gordon Lynn Blumenschein. These collaborations have likely enriched his work and led to further advancements in telecommunications technology.
Conclusion
Douglas Marshall is a distinguished inventor whose contributions to telecommunications have had a lasting impact. His innovative patents and career achievements reflect his dedication to improving communication systems.