Location History:
- Seattle, WA (US) (1990 - 2000)
- Newcastle, WA (US) (2010 - 2018)
- Redmond, WA (US) (2023)
Company Filing History:
2 out of 166 
2 out of 2 
1 out of 309 
Years Active: 1990-2023
Title: Innovations of David M Shemwell
Introduction
David M Shemwell is a notable inventor based in Seattle, WA (US), recognized for his contributions to the field of lighting technology. With a total of nine patents to his name, Shemwell has made significant advancements that enhance energy efficiency and functionality in airfield lighting systems.
Latest Patents
One of his latest inventions is the "Compact portable/fixed airfield light." This invention features a body that houses both a medium intensity lighting arrangement and a high intensity lighting arrangement. The medium intensity lighting provides an omnidirectional light source, while the high intensity lighting offers either a unidirectional or bidirectional light source. This innovative design is energy efficient compared to conventional airfield lights and is particularly useful for temporary airfields. Additionally, Shemwell has developed a "Light emitting diode based PAPI method and system incorporating diode arrays and cylindrical optics." This invention addresses limitations in brightness and heating effects for LED-based Precision Approach Path Indicators, allowing for proper imaging of both colors in the far field with an abrupt transition between the red and white sectors.
Career Highlights
Throughout his career, David M Shemwell has worked with various companies, including Respironics, Inc. His work has focused on improving lighting systems, particularly in aviation, showcasing his commitment to innovation and efficiency.
Collaborations
Shemwell has collaborated with notable individuals in his field, including George R Ryan and Weihao Alexander Long. These collaborations have likely contributed to the development and refinement of his patented technologies.
Conclusion
David M Shemwell's innovative contributions to lighting technology, particularly in airfield applications, demonstrate his expertise and commitment to enhancing energy efficiency. His patents reflect a forward-thinking approach that addresses current challenges in the industry.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.