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For the Inventor, By the Inventor

El Cerrito, CA, United States of America

Clifford Conrad Federspiel

This inventor holds 20 USPTO granted patents and 1 published patent application and 5 EPO patents, primarily in HVAC Control Optimization. Top assignees: Vigilent Corporation, Federspiel, Corporation, Other. Active years: 2003-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Clifford Conrad Federspiel. Retrieved from https://idiyas.com/inventor/clifford-conrad-federspiel

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

USPTO Granted Patents = 20 

% Patents Active = 95.0

 

Average Co-Inventor Count = 1.8

ph-index = 9

Forward Citations = 242(Granted Patents)


Location History:

  • El Cerrito, CA (2016)
  • El Cerrito, CA (US) (2003 - 2023)

Company Filing History:

goldMedal15 out of 18 
 
Vigilent Corporation
 patents
silverMedal3 out of 3 
 
Federspiel, Corporation
 patents
bronzeMedal2 out of 834,570 
Other
 patents

Years Active: 2003-2025

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Areas of Expertise:
Deep Learning
HVAC Control
Energy Optimization
Environmental Management
Smart Alarms
Risk Score
Cooling Systems
Temperature Control
Data Center Cooling
Calibration Override
Power Consumption
Flow Rate Measurement
20 patents (USPTO):Explore Patents
1. 12423572 - Optimal control with deep learning (2025-09-23),
2. 11567966 - Effectiveness maps (2023-01-31),
3. 11181289 - System and method for controlling the heating, ventilation, and air conditioning (HVAC) in a building to defend against pathogens (2021-11-23),
4. 10969128 - Method and apparatus for optimizing control variables to minimize power consumption of cooling systems (2021-04-06),
5. 10417596 - Point-based risk score for managing environmental systems (2019-09-17),
6. 10410502 - Method and apparatus for providing environmental management using smart alarms (2019-09-10),
7. 10108154 - Influence learning for managing physical conditions of an environmentally controlled space by utilizing a calibration override which constrains an actuator to a trajectory (2018-10-23),
8. 9898917 - Method and apparatus for providing environmental management using smart alarms (2018-02-20),
9. 9822989 - Controlling air temperatures of HVAC units (2017-11-21),
10. 9568924 - Methods and systems for coordinating the control of HVAC units (2017-02-14),
11. 9317045 - Method and apparatus for efficiently coordinating data center cooling units (2016-04-19),
12. 9291358 - Accuracy-optimal control decisions for systems (2016-03-22),
13. 8924026 - Energy-optimal control decisions for systems (2014-12-30),
14. 8688243 - Method and apparatus for controlling fans in heating, ventilating, and air-conditioning systems (2014-04-01),
15. 8634962 - Method and apparatus for efficiently coordinating data center cooling units (2014-01-21),

Title: Clifford Conrad Federspiel: Innovator in Environmental Control Technologies

Introduction

Clifford Conrad Federspiel, based in El Cerrito, CA, is a distinguished inventor with a remarkable portfolio comprising 19 patents. His work primarily focuses on enhancing environmental maintenance systems, showcasing his commitment to innovation in building management technologies.

Latest Patents

Federspiel's latest contributions include groundbreaking patents such as "Effectiveness maps," which facilitate the understanding of how environmental maintenance devices interact in controlled spaces. By modeling these interactions graphically, his effectiveness maps reveal insights applicable to various settings, including data centers and office buildings. For instance, in a data center scenario, the patent exemplifies how computer room air conditioners (CRACs) influence one another's performance. Similarly, in office environments, the effectiveness map addresses the influence of variable air volume (VAV) terminal units on thermostat readings.

Another notable patent involves a "System and method for controlling the heating, ventilation, and air conditioning (HVAC) in a building to defend against pathogens." This innovative method employs a computer-implemented system designed to optimize HVAC operations by estimating airborne latent loads and adjusting controls to improve disinfection effectiveness.

Career Highlights

Federspiel has made significant strides in his career with notable associations, including his roles at Vigilent Corporation and Federspiel Corporation. His endeavors in these organizations highlight his expertise in developing intelligent environmental control solutions.

Collaborations

Throughout his career, Federspiel has collaborated with talented individuals like Peter Christian Varadi and Jerry Chin. These partnerships reflect a shared vision of creating advanced technologies that address the challenges of environmental management in various infrastructures.

Conclusion

Clifford Conrad Federspiel stands out as an influential inventor in the field of environmental control technologies. With a wealth of patents to his name and a commitment to innovation, he continues to pave the way for advancements that improve the effectiveness and efficiency of HVAC systems in modern buildings. His work not only enhances operational performance but also contributes to healthier indoor environments.

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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