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For the Inventor, By the Inventor

Waban, MA, United States of America

Francis D Kirchoff

This inventor holds 8 USPTO granted patents. Top assignee: Alco Electronic Products, Inc.. Active years: 1977-1984.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Francis D Kirchoff. Retrieved from https://idiyas.com/inventor/francis-d-kirchoff

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

USPTO Granted Patents = 8

% Patents Active = 100.0

Average Co-Inventor Count = 1.1

ph-index = 4

Forward Citations = 25(Granted Patents)


Location History:

  • Waban, MA (US) (1977 - 1982)
  • Newton, MA (US) (1984)

Company Filing History:

goldMedal8 out of 12 
 
Alco Electronic Products, Inc.
 patents

Years Active: 1977-1984

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8 patents (USPTO):Explore Patents
1. 4480159 - Sub-miniature three position switch with built-in lever lock (1984-10-30),
2. 4340793 - Sub-miniature, two position double pole switch (1982-07-20),
3. 4254310 - Subminiature, multi-pole toggle switch with linear see-saw contacts (1981-03-03),
4. 4191387 - Watertight seal for toggle switches (1980-03-04),
5. 4117284 - Subminiature, three position, switch with non-sliding rocker contact (1978-09-26),
6. 4110574 - Sub-miniature, two position double pole switch (1978-08-29),
7. D247809 - Toggle switch baton (1978-05-02),
8. 4058764 - Combined pilot light and ground testing assembly (1977-11-15),

Title: The Innovative Contributions of Francis D. Kirchoff

Introduction

Francis D. Kirchoff is a notable inventor based in Waban, MA, who has made significant contributions to the field of electronic products. With a total of eight patents to his name, Kirchoff has demonstrated a commitment to innovation and excellence in his work.

Latest Patents

Among his latest inventions is the sub-miniature three-position switch with a built-in lever lock. This toggle switch features sub-miniature dimensions that eliminate the need for machining flat parts on the toggle lever or drilling a pin on the toggle lever. It achieves this by mounting a one-piece lever lock insert within the upper portion of the cylindrical housing of the toggle lever. The insert has three aligned, generally truncated conical recesses in its top surface, allowing for selective engagement with a spring-pressed detent on the toggle handle. Another notable patent is the sub-miniature, two-position double pole switch. This switch has flat, planar terminals of rectangular cross-section with projecting portions bent at right angles, designed for insertion into the circular apertures of a modular printed circuit board. The terminals are pre-formed with the right angular configuration to avoid cracks in the coating due to bending.

Career Highlights

Kirchoff is currently associated with Alco Electronic Products, Inc., where he continues to innovate and develop new electronic solutions. His work has been instrumental in advancing the technology used in electronic switches and components.

Collaborations

Throughout his career, Kirchoff has collaborated with notable colleagues, including Ellis K. Washburn and Ralph M. Manning. These partnerships have contributed to the successful development of various electronic products.

Conclusion

Francis D. Kirchoff's contributions to the field of electronics through his innovative patents and collaborations highlight his importance as an inventor. His work continues to influence the industry and inspire future innovations.

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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