This inventor holds 5 USPTO granted patents and 1 published patent application and 1 EPO patent. Top assignees: Continental Automotive Systems Corporation, Vitesco Technologies USA, LLC. Active years: 2018-2026.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
3 out of 811 
2 out of 73 Years Active: 2018-2026
Title: Daniel William Shafer: Power Electronics Inventor
Introduction
Daniel William Shafer is an inventor based in Mussey, Michigan. His patent work focuses on DC-DC converter technology, including methods for improving power conversion efficiency and extending performance across different operating conditions. Shafer is associated with 5 patents.
Latest Patents
Shafer’s recent patent work includes innovations in resonant converters and DC-DC converter control.
“Resonant Converter Having Variable Frequency Control and Valley Skipping Time-Shift for Efficient Soft Switching Operation” describes a method for controlling a DC-DC converter used to charge a battery. The method adjusts the converter’s operating frequency to regulate charging current when the output voltage reaches a predefined level. At lower output voltages, it applies a time shift to a gate signal, supporting efficient soft-switching operation.
“DC-DC Converter with Extended Light Load Operating Range, and Method of Using Same” describes a converter with a bridge circuit, resonant tank, rectifier, output filter, and controller. The controller adjusts the bridge’s switching frequency so the converter can operate in both boost and buck modes. In buck mode, it can selectively block energy transfer when the output current exceeds demand, helping reduce current and extend the converter’s operating range.
Career Highlights
Shafer’s listed professional experience includes Continental Automotive Systems Corporation and Vitesco Technologies USA, LLC. His patent portfolio reflects work on power conversion systems and control techniques relevant to automotive and other electronic applications.
Collaborations
Lance Ronald Strayer is identified as a coworker. The available information does not specify the nature of their collaboration or whether they worked together on particular patents.
Conclusion
Daniel William Shafer’s inventions address practical challenges in DC-DC power conversion, with an emphasis on efficient switching, battery charging control, and broader operating ranges.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile