Palo Alto, CA, United States of America

John P Ekstrand

This inventor holds 13 USPTO granted patents, primarily in Induction Heating Technology. Top assignees: Spectra-Physics Gmbh, Metcal, Inc., Other. Active years: 1976-1994.

IDiyas Innovation Intelligence. (2026). Inventor Profile: John P Ekstrand. Retrieved from https://idiyas.com/inventor/john-p-ekstrand

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

% Patents Active = 100.0

Average Co-Inventor Count = 1.2

ph-index = 11

Forward Citations = 334(Granted Patents)


Company Filing History:


Years Active: 1976-1994

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Areas of Expertise:
Thermal Induction Heater
Induction Heated Cathode
RF Induction Excited Ion Laser
Beam Position Sensor
Angular Optical Cavity
Feedback Loop Gain Compensation
Switched Resistor Regulator
Diode-Snubber
Shunt Switched Resistor
Signal Processing
Crossed Dot Bar Graph
Normalizing Circuit
13 patents (USPTO):Explore Patents

Title: The Innovative Contributions of John P. Ekstrand

Introduction

John P. Ekstrand is a notable inventor based in Palo Alto, California, recognized for his significant contributions to the field of technology and engineering. With a total of 13 patents to his name, Ekstrand has made remarkable advancements, particularly in heating technologies and vacuum systems.

Latest Patents

Among his latest inventions is the Thermal Induction Heater, which utilizes a ferromagnetic material heated by a varying magnetic field. This innovative heater is designed for medical applications, featuring a large cross-section comprised of many small, insulated members. Each member is surrounded by a heat conductive, electrically conductive coating, enhancing its efficiency. Another significant patent is the Induction Heated Cathode, which improves vacuum and plasma tubes. This invention includes a cathode loop made of a material suitable for induction heating, supported by a structure within the vacuum tube. An external power supply generates an alternating electromagnetic field to induce heat in the cathode loop, facilitating the release of electrons into the vacuum tube. This technology is particularly beneficial for ion laser gain mediums.

Career Highlights

Throughout his career, John P. Ekstrand has worked with prominent companies such as Spectra-Physics GmbH and Metcal, Inc. His experience in these organizations has contributed to his expertise and innovative capabilities in the field.

Collaborations

Ekstrand has collaborated with notable individuals in his field

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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