This inventor holds 4 USPTO granted patents. Top assignees: The Scott-Fetzer Company, Circle Prime Mfg. Co., Other. Active years: 1980-1993.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Lodi, Both of, OH (US) (1981)
- Lodi, OH (US) (1980 - 1993)
Company Filing History:
2 out of 257 
1 out of 1 
1 out of 834,570 Years Active: 1980-1993
Title: John E Keim: Innovator in RF Technology
Introduction
John E Keim is a notable inventor based in Lodi, OH (US), recognized for his contributions to radio frequency (RF) technology. He holds a total of 4 patents, showcasing his innovative spirit and technical expertise in the field.
Latest Patents
One of his latest patents is the RF test load and method for internal use thereof. This invention describes an internal test load designed to absorb energy from a power source, such as an RF transmitter, transceiver, or amplifier. The test load is strategically positioned within a housing and includes at least one impedance device, like a power resistor, which is matched to the power source's impedance. The impedance device is supported on a heat sink that absorbs heat generated by the device, distributing it over a larger area. The heat sink is designed to 'float' within a potting material, ensuring that heat is dissipated effectively without transferring directly to the housing.
Another significant patent is the antenna VSWR indicator. This invention features a pocket-sized device equipped with a self-contained low-level wideband RF signal source. It is applied to an antenna under test through a four-arm RF resistive bridge circuit, which is designed for accuracy and reliability. The bridge circuit provides a flat response over a wide frequency range and various antenna impedances. The VSWR indicator offers immediate feedback on the matching of the radio transmitter and antenna, ensuring maximum power transfer and efficiency.
Career Highlights
Throughout his career, John E Keim has worked with various companies, including the Scott & Fetzer Company. His experience in these organizations has contributed to his development as an inventor and innovator in RF technology.
Collaborations
John has collaborated with notable coworkers such as Maw H Lee and James M Motherbaugh, further enhancing his work in the field.
Conclusion
John E Keim's innovative contributions to RF technology, particularly through his patents, demonstrate his significant impact on the industry. His work continues to influence advancements in radio frequency applications and testing methods.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile