Growing community of inventors

Riverview, Canada

Calvin Duke Martini

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.

Forward Citations = 23

Calvin Duke MartiniEugene Anthony Helmetsie (2 patents)Calvin Duke MartiniPaul Chiasson (1 patent)Calvin Duke MartiniCalvin Duke Martini (2 patents)Eugene Anthony HelmetsieEugene Anthony Helmetsie (11 patents)Paul ChiassonPaul Chiasson (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Other (1 from 832,812 patents)

2. Spielo Manufacturing Incorporated (1 from 3 patents)


2 patents:

1. 6652173 - Ticket dispensing mechanism

2. 6162159 - Ticket dispenser

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as of
12/19/2025
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