Growing community of inventors

Beaverton, OR, United States of America

Frederick E Severson

Average Co-Inventor Count = 1.43

ph-index = 13

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 546

Frederick E SeversonPatrick A Quinn (13 patents)Frederick E SeversonPat Quinn (1 patent)Frederick E SeversonPatrick Allen Quinn (1 patent)Frederick E SeversonFrederick E Severson (25 patents)Patrick A QuinnPatrick A Quinn (29 patents)Pat QuinnPat Quinn (1 patent)Patrick Allen QuinnPatrick Allen Quinn (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Other (14 from 832,966 patents)

2. Qs Industries, Inc. (10 from 10 patents)


25 patents:

1. 9511303 - Signaling and remote control train operation

2. 9449590 - Low frequency audio sound effects in model railroading

3. 8701562 - Signaling and remote control train operation

4. 8408143 - Sound systems for model railroad locomotives

5. 8166887 - Sound systems for model railroad locomotives

6. 8070108 - Signaling and remote control train operation

7. 7954435 - Sound systems for model railroad locomotives

8. RE42284 - Signaling techniques for DC track powered model railroads

9. 7859424 - Proximity control of on-board processor-based model train sound and control system

10. 7770847 - Signaling and remote control train operation

11. 7451708 - Sound systems for model railroad locomotives

12. 7429931 - Proximity control of on-board processor-based model train sound and control system

13. 6230140 - Continuous sound by concatenating selected digital sound segments

14. 5940005 - Method and apparatus for storing and utilizing a unique power down state

15. 5896017 - Model train locomotive with doppler shifting of sound effects

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