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Downsview, Canada

Aastra Corporation

USPTO Granted Patents = 1

Forward Citations = 85

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5 inventors (with patents filed for the assignee):

Francis N Shen (1 out of 13 patents)

Anthony P Shen (1 out of 5 patents)

Grigor K Kotzev (1 out of 2 patents)

4. Eric C Edwards (1 out of 1 patent)

5. Gerrard B Schmid (1 out of 1 patent)

1 patent: Sort by Forward Citations

1. 5481594 - Audio caller identification unit (1996-01-02),

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USPTO Data Jan 1 1976 - Dec 23 2025

1 Patents

#31 in Downsview

#9,173 in Canada

Downsview, Canada

Aastra Corporation

Forward Citations = 85

5 inventors:

Francis N Shen (1 out of 13 patents)

Anthony P Shen (1 out of 5 patents)

Grigor K Kotzev (1 out of 2 patents)

4. Eric C Edwards (1 out of 1 patent)

5. Gerrard B Schmid (1 out of 1 patent)

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