Average Co-Inventor Count = 1.50
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. Dutch Blacksmith Shop Ltd. (2 from 11 patents)
2 patents:
1. 6457426 - Front tube furrow opener attachment
2. 6406368 - Straw and chaff spreader with spread to the rear