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For the Inventor, By the Inventor

North York, Canada

Aastra Aerospace Inc.


USPTO Granted Patents = 2

Forward Citations = 55

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1 inventor (with patents filed for the assignee):

goldMedal Anthony P Shen (2 out of 5 patents)


2 patents:

1. 5812649 - Method and apparatus for supporting spontaneous call waiting (1998-09-22),
2. 5764758 - Interrupted tone converter (1998-06-09),
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USPTO Data Jan 1 1976 - Dec 23 2025

2 Patents

#24 in North York

#5,838 in Canada

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North York, Canada

Aastra Aerospace Inc.

Forward Citations = 55

1 inventor:

goldMedal Anthony P Shen (2 out of 5 patents)

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