Average Co-Inventor Count = 2.40
ph-index = 2
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. Superior Fireplace Company (1 from 20 patents)
2. Lennox Hearth Products, Inc. (1 from 3 patents)
2 patents:
1. 6991454 - Gas burner
2. 5553603 - Air to fuel ratio adjustment device for sealed-combustion type fireplaces