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For the Inventor, By the Inventor

Rockland, MA, United States of America

Electro Signal Lab, Inc.


USPTO Granted Patents = 3

Forward Citations = 35

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2 inventors (with patents filed for the assignee):

goldMedal Robert B Enemark (2 out of 9 patents)

silverMedal Donald F Steele (1 out of 11 patents)


3 patents:

1. 4186390 - Battery powered smoke detector (1980-01-29),
2. 4124298 - Optical smoke detector inlet screen (1978-11-07),
3. 4025915 - LED smoke detector circuit (1977-05-24),
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USPTO Data Jan 1 1976 - Jan 13 2026

3 Patents

#9 in Rockland, MA

#3,879 in Massachusetts

#72,120 in US

...
Rockland, MA, United States of America

Electro Signal Lab, Inc.

Forward Citations = 35

2 inventors:

goldMedal Robert B Enemark (2 out of 9 patents)

silverMedal Donald F Steele (1 out of 11 patents)

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