Average Co-Inventor Count = 1.36
ph-index = 10
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Lifeline Systems, Inc. (6 from 28 patents)
2. American District Telegraph Company (3 from 91 patents)
3. Other (2 from 832,880 patents)
11 patents:
1. 5870453 - Automatic control system for a remotely controllable sound producing
2. 5420907 - Automatic control system for a remotely controllable sound producing
3. 5091930 - Enhancement of a personal emergency response system
4. 4884059 - Apparatus and method for reporting verification testing of a personal
5. 4884060 - Multi-state selection switch for a personal emergency response system
6. 4760593 - Personal alarm system providing handsfree operation
7. 4686697 - Telephone care system with telephone line-checking
8. 4524243 - Personal alarm system
9. 4117479 - Multi-mode intrusion alarm system
10. 3938118 - Multizone intrusion alarm system
11. 3932870 - On-line test circuit for intrusion alarm systems