Growing community of inventors

Rexdale, Canada

Michael H Markham

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.

Forward Citations = 32

Michael H MarkhamJoseph A Varga (1 patent)Michael H MarkhamRudolf S Ruston (1 patent)Michael H MarkhamMichael H Markham (3 patents)Joseph A VargaJoseph A Varga (11 patents)Rudolf S RustonRudolf S Ruston (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Chubb Industries Limited (2 from 5 patents)

2. Other (1 from 832,812 patents)


3 patents:

1. 4266488 - Relocking device for safes and the like

2. 4176610 - Safe deposit apparatus

3. 4004252 - Safe deposit apparatus, with selective plate and shield for dual

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as of
12/22/2025
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