Growing community of inventors

Cedar Falls, IA, United States of America

Richard D Purchase

Average Co-Inventor Count = 2.57

ph-index = 3

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 = 110

Richard D PurchaseJohn P Oltman (2 patents)Richard D PurchaseDonald N Sulentic (1 patent)Richard D PurchaseNormal L Calhoun (1 patent)Richard D PurchaseSteven J Kreger (1 patent)Richard D PurchaseRichard D Purchase (3 patents)John P OltmanJohn P Oltman (4 patents)Donald N SulenticDonald N Sulentic (1 patent)Normal L CalhounNormal L Calhoun (1 patent)Steven J KregerSteven J Kreger (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Waterloo Industries, Inc. (3 from 110 patents)


3 patents:

1. 5372175 - Tambour door construction

2. 4714158 - Molded tool tray assembly

3. 4570392 - Storehouse construction

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as of
1/3/2026
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