Glen Ellyn, IL, United States of America

David F Winchell

This inventor holds 11 USPTO granted patents. Top assignees: At&t Bell Laboratories, American Telephone & Telegraph Co., At&t Bell Laboratories, Bell Telephone Laboratories. Active years: 1981-1987.

USPTO Granted Patents = 11

% Patents Active = 100.0

Average Co-Inventor Count = 2.2

ph-index = 11

Forward Citations = 753(Granted Patents)

Location History:

Glen Ellen, IL (US) (1984)
Glen Ellyn, IL (US) (1981 - 1987)
Hollis, NH (US) (1987)

Company Filing History:

9 out of 3,345

At&t Bell Laboratories

patents

1 out of 745

American Telephone & Telegraph Co., At&t Bell Laboratories

patents

1 out of 2,714

Bell Telephone Laboratories

patents

Years Active: 1981-1987

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11 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4691347 - Method and apparatus for controlling a conference (1987-09-01),

2. 4653045 - Interactive facility control arrangement (1987-03-24),

3. 4635251 - Meet-me conference with control capabilities (1987-01-06),

4. 4550224 - Method and apparatus for adding conferees to a conference (1985-10-29),

5. 4544804 - Conference control transfer arrangement (1985-10-01),

6. 4540850 - Method and apparatus for controlling a conference (1985-09-10),

7. 4529842 - Automatic fault recovery arrangement (1985-07-16),

8. 4479211 - Method and apparatus for controlling ports in a digital conference (1984-10-23),

9. 4475189 - Automatic interactive conference arrangement (1984-10-02),

10. 4460807 - Conference routing arrangement (1984-07-17),

11. 4305045 - Phase locked loop clock synchronizing circuit with programmable (1981-12-08),

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