Growing community of inventors

Darien, IL, United States of America

Donald L Ledermann

Average Co-Inventor Count = 2.40

ph-index = 7

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 = 226

Donald L LedermannJohn F Stufflebeam (4 patents)Donald L LedermannDarlo E Lienemann (2 patents)Donald L LedermannNicholas H Wunschl (2 patents)Donald L LedermannKeith Walter Wendte (1 patent)Donald L LedermannDavid D Flamme (1 patent)Donald L LedermannRobert C Lane (1 patent)Donald L LedermannRonald L Otten (1 patent)Donald L LedermannDonald L Ledermann (8 patents)John F StufflebeamJohn F Stufflebeam (25 patents)Darlo E LienemannDarlo E Lienemann (3 patents)Nicholas H WunschlNicholas H Wunschl (3 patents)Keith Walter WendteKeith Walter Wendte (84 patents)David D FlammeDavid D Flamme (12 patents)Robert C LaneRobert C Lane (1 patent)Ronald L OttenRonald L Otten (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Case Corporation (4 from 575 patents)

2. J. I. Case Company (3 from 564 patents)

3. International Harvester Company (1 from 481 patents)


8 patents:

1. 5740746 - Seed material dispensing system for an agricultural planter

2. 5655468 - Delivery system for an agricultural implement

3. 5555824 - Operator controlled pressure applicator for the furrow forming mechanism

4. 5515795 - Delivery system for a foldable agricultural implement

5. 5133270 - Bander assembly for an agricultural implement

6. 4744316 - Furrow forming apparatus for a seed planter

7. 4681335 - Center pivot hitch assembly

8. 4425857 - Lock-up mechanism for a planter row unit

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as of
1/11/2026
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