Growing community of inventors

Twin Lake, MI, United States of America

Frederick C Liebertz

Average Co-Inventor Count = 1.60

ph-index = 4

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 = 38

Frederick C LiebertzMark A Powell (3 patents)Frederick C LiebertzFrederick C Liebertz (4 patents)Mark A PowellMark A Powell (11 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Haworth, Inc. (4 from 485 patents)


4 patents:

1. 6419333 - Knock-down vertical file

2. 6231141 - Knock-down vertical file

3. 6007170 - Knock-down vertical file

4. 5775786 - Drawer slide

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as of
1/19/2026
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