Location History:
- Pierre Port, LA (US) (1993)
- Ventura, CA (US) (1995 - 1996)
- Thousand Oaks, CA (US) (2008 - 2010)
- North Attleboro, MA (US) (2012)
- Tulsa, OK (US) (2016 - 2024)
Company Filing History:
2 out of 2,483 
2 out of 1,152 
2 out of 8 
Years Active: 1993-2025
Title: The Innovative Contributions of Donald L Baker
Introduction
Donald L Baker is a notable inventor based in Tulsa, OK (US), recognized for his significant contributions to the field of electronics and musical instruments. With a total of 17 patents to his name, Baker has developed innovative technologies that enhance both audio performance and user experience.
Latest Patents
One of his latest inventions is the "Semi-log preamp with switched gains." This invention features a linear preamp with switchable and variable gains, designed for multiple switched input signal circuits. The output of the preamp compensates for differences in input signal amplitudes or desired signal levels for various inputs. The gain control position produces a nearly logarithmic change in gain, aligning better with human hearing. This preamp operates with minimal low- or micro-power components, allowing for extended run times on small battery packs.
Another significant invention is the "Electric stringed instrument using movable pickups and humbucking circuits." This invention presents a hollow-body guitar with a large rectangular sound hole, featuring two pickup mounting slots on each side. It includes a system of top plates and mounting adapters for seven different single-coil and dual-coil pickup types. The invention incorporates a humbucking pickup circuit mixing module that can be cascaded in various configurations, providing a broader range of tones than traditional switching systems. This allows for the mixing of different pickups to create numerous humbucking circuits and continuous tone variations.
Career Highlights
Throughout his career, Donald L Baker has worked with various companies, including Baxter International Inc. His innovative spirit and technical expertise have led to advancements in both electronic and musical instrument design.
Collaborations
Baker has collaborated with notable individuals such as Shane Donovan and Gregory D Linville, contributing to the development of his groundbreaking inventions.
Conclusion
Donald L Baker's inventive work has made a lasting impact on the fields of electronics and music, showcasing his ability to blend technology with creativity. His patents reflect a commitment to enhancing user experience and expanding the possibilities within these industries.