For the Inventor, By the Inventor

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Radolfzell, Germany

Ing. Erich Pfeiffer Gmbh & Co Kg

USPTO Granted Patents = 48

Forward Citations = 1,876

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17 inventors (with patents filed for the assignee):

Karl-Heinz Fuchs (27 out of 79 patents)

Lothar Graf (13 out of 19 patents)

Leo Maerte (7 out of 8 patents)

4. Thomas Skorka (7 out of 7 patents)

5. Stefan Ritsche (4 out of 37 patents)

6. Peter Pfeiffer (3 out of 4 patents)

7. Michael Wolter (3 out of 7 patents)

8. Ernst Buhr (2 out of 2 patents)

9. Bernhard Guentert (2 out of 2 patents)

10. Hans-Josef Schuetz (2 out of 2 patents)

11. Reinhold Jaeger-Waldau (1 out of 1 patent)

12. Friedrich Zuckschwerdt (1 out of 1 patent)

13. Fritz Zuckschwerdt (1 out of 1 patent)

14. Guiseppe Malinconico (1 out of 1 patent)

15. James D Wiggins (1 out of 1 patent)

48 patents: Sort by Forward Citations

1. 5803311 - Bottle closure for squeezing bottle (1998-09-08),

2. 5655689 - Media dispenser having a variable constriction outlet (1997-08-12),

3. 5584417 - Dispenser for discharging a fluid medium (1996-12-17),

4. 5520337 - Controllable discharge head for controlling the flow media delivered (1996-05-28),

5. 5519980 - Filling device for filling into magazine chambers (1996-05-28),

6. 5482193 - Dispenser for media (1996-01-09),

7. 5469989 - Dispenser for positively discharging a medium through a plurality of (1995-11-28),

8. 5443185 - Dispenser for media (1995-08-22),

9. 5439177 - Discharge head for discharge apparatuses such as manual pumps for (1995-08-08),

10. 5437398 - Media dispenser with isolated pump restoring system (1995-08-01),

11. 5427280 - Media dispenser with dosing stroke limiter (1995-06-27),

12. 5395032 - Dispenser for media (1995-03-07),

13. 5375745 - Media dispenser with initial pressure-relief state (1994-12-27),

14. 5368201 - Pressure-operable locking valve for media dispenser (1994-11-29),

15. 5366122 - Dispenser for flowable media (1994-11-22),

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USPTO Data Jan 1 1976 - Dec 9 2025

48 Patents

#4 in Radolfzell

#1,130 in Germany

#14,104 in the World

Radolfzell, Germany

Ing. Erich Pfeiffer Gmbh & Co Kg

Forward Citations = 1,876

17 inventors:

Karl-Heinz Fuchs (27 out of 79 patents)

Lothar Graf (13 out of 19 patents)

Leo Maerte (7 out of 8 patents)

4. Thomas Skorka (7 out of 7 patents)

5. Stefan Ritsche (4 out of 37 patents)

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