Growing community of inventors

Ladd, IL, United States of America

David Margherio

Average Co-Inventor Count = 2.67

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.

Forward Citations = 76

David MargherioRoy W Salecker (1 patent)David MargherioRockwell T Sloter (1 patent)David MargherioDonald J Borelli (1 patent)David MargherioDonald Borelli (1 patent)David MargherioDavid Margherio (2 patents)Roy W SaleckerRoy W Salecker (10 patents)Rockwell T SloterRockwell T Sloter (4 patents)Donald J BorelliDonald J Borelli (1 patent)Donald BorelliDonald Borelli (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Spartan Tool Div. of Pettibone Corp. (1 from 7 patents)

2. Spartan Tool, LLC (1 from 5 patents)


2 patents:

1. 6655228 - Dual directional power feed

2. 5309595 - Drain cleaning apparatus

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as of
12/15/2025
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