logo

For the Inventor, By the Inventor

Chicago, IL, United States of America

Joseph S Droho

This inventor holds 17 USPTO granted patents. Top assignees: North American Philips Corporation, Advance Transformer Company, Philips Electronics North America Corporation. Active years: 1983-1996.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Joseph S Droho. Retrieved from https://idiyas.com/inventor/joseph-s-droho

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

USPTO Granted Patents = 17

% Patents Active = 100.0

Average Co-Inventor Count = 1.3

ph-index = 7

Forward Citations = 143(Granted Patents)


Location History:

  • Elmwood, IL (US) (1995)
  • Chicago, IL (US) (1983 - 1996)

Company Filing History:

goldMedal9 out of 950 
 
North American Philips Corporation
 patents
silverMedal4 out of 19 
 
Advance Transformer Company
 patents
bronzeMedal2 out of 838 
 
Philips Electronics North America Corporation
 patents
4. 1 out of 1 
 
501 Advance Transformer Company
 patent
5. 1 out of 834,570 
Other
 patents

Years Active: 1983-1996

Loading Chart...
17 patents (USPTO):Explore Patents
1. 5574419 - Unique electrical coil with tap (1996-11-12),
2. 5485669 - Method of making an electrical coil (1996-01-23),
3. 5440286 - Electrical transformer structure with coil covers (1995-08-08),
4. 5430354 - HID lamp and auxiliary lamp ballast using a single multiple function (1995-07-04),
5. 5175469 - Combination including an emergency lighting arrangement (1992-12-29),
6. 5132870 - Ignitor circuit for discharge lamps with novel ballast (1992-07-21),
7. 5103153 - Control equipment for multi-speed electric motors (1992-04-07),
8. 5072156 - Ballast circuit with means to disconnect power factor capacitor (1991-12-10),
9. 5051664 - Ignitor circuit for discharge lamps with novel ballast (1991-09-24),
10. 5017840 - Ignitor circuit for discharge lamps with novel ballast (1991-05-21),
11. 5013977 - Ignitor for high pressure arc discharge lamps (1991-05-07),
12. 4977346 - High pressure sodium discharge lamp having gas filled outer envelope (1990-12-11),
13. 4939430 - Ignitor circuit for discharge lamps with novel ballast (1990-07-03),
14. 4847535 - Hybrid ballast for multiple discharge lamps (1989-07-11),
15. 4740861 - Thermal protection device for a dual input voltage lamp (1988-04-26),

Title: The Innovative Journey of Joseph S. Droho

Introduction: Joseph S. Droho, an inventive mind from Chicago, IL, has made significant contributions to the field of electrical engineering through his 17 patents. His innovative approach to electrical coils has led to methods that enhance efficiency and functionality in various applications.

Latest Patents: Among his latest inventions, Joseph has developed a "Unique Electrical Coil with Tap," which is a method for bringing a predetermined turn of coil located inside the width of the coil and beneath at least one layer of the coil. Additionally, he has created a "Method of Making an Electrical Coil," focusing on a loop of a predetermined turn of coil positioned similarly within the coil's width. These patents illustrate his commitment to advancing coil technology.

Career Highlights: Joseph's professional journey includes noteworthy tenures at North American Philips Corporation and Advance Transformer Company. His work in these established organizations has allowed him to expand his expertise and play a pivotal role in the development of innovative electrical solutions.

Collaborations: Throughout his career, Joseph has collaborated with fellow innovators such as Robert W. Wisbey and Ray G. Gibson. These partnerships have fueled creativity and innovation in their projects, contributing to advancements in electrical coil technology.

Conclusion: Joseph S. Droho's contributions to electrical engineering through his numerous patents highlight his status as a leading inventor. His innovative methodologies in coil design continue to impact the industry, paving the way for future developments in technology.

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]
Loading…