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For the Inventor, By the Inventor

Bellevue, WA, United States of America

Appa Systems, Inc.


USPTO Granted Patents = 2

Forward Citations = 10

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2 inventors (with patents filed for the assignee):

goldMedal Ekhard Preikschat (2 out of 10 patents)

silverMedal Robert J Hilker (2 out of 2 patents)


2 patents:

1. 5627330 - Leverage insertion assembly (1997-05-06),
2. 5600058 - Rotating consistency transmitter and method (1997-02-04),
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USPTO Data Jan 1 1976 - Sep 29 2026

2 Patents

#227 in Bellevue, WA

#2,341 in Washington

#94,730 in US

Bellevue, WA (US)
Bellevue, WA, United States of America

Appa Systems, Inc.

Forward Citations = 10

2 inventors:

goldMedal Ekhard Preikschat (2 out of 10 patents)

silverMedal Robert J Hilker (2 out of 2 patents)

Please report any incorrect information to [email protected]
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