This inventor holds 2 USPTO granted patents. Top assignees: Dolby Laboratories Licensing Corporation, Sony Cinema Products Corporation, Sony Corporation. Active years: 1997-2003.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
1 out of 2,747 
1 out of 22 
1 out of 58,150 
Years Active: 1997-2003
Title: The Innovations of Raymond E Callahan, Jr.
Introduction
Raymond E Callahan, Jr. is a notable inventor based in Torrance, California. He has made significant contributions to the field of digital sound and photographic recording technologies. With a total of 2 patents, his work reflects a deep understanding of audio systems and data recording methods.
Latest Patents
One of Callahan's latest patents is for a system that utilizes matrix-encoded surround-sound channels in a discrete digital sound format. This innovative design allows for more than two surround sound channels to be encoded into just two discrete channels, ensuring compatibility with existing playback equipment. The digital audio stream remains unaltered, maintaining the integrity of the sound quality.
Another significant patent involves a system for photographically recording digital data and analog audio signals on a photosensitive medium, such as motion picture film. This system allows for multiple formats of digital data and analog audio to be recorded simultaneously. The design includes a camera assembly that captures digital data in real time, utilizing different wavelengths of light for various formats. This advancement enhances the capabilities of motion picture film by integrating digital technology seamlessly.
Career Highlights
Throughout his career, Callahan has worked with prominent companies such as Sony Corporation and Sony Cinema Products Corporation. His experience in these organizations has contributed to his expertise in audio and visual technologies.
Collaborations
Callahan has collaborated with notable individuals in the industry, including Ioan R Allen and LeRoy H Reese. These partnerships have likely influenced his innovative approaches and contributed to the development of his patents.
Conclusion
Raymond E Callahan, Jr. stands out as an influential inventor in the realm of digital sound and photographic recording. His patents demonstrate a commitment to advancing technology in these fields, showcasing his innovative spirit and technical expertise.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile