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Inventor

David G. Parman

Inventor
San Ramon, CA, US

Overview

7→
Patents
1984–2021
Patent span
Electricity
Primary field (CPC H)

Patents· 7 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H05Bprimary
H05BElectric heating31%
E21BEarth or rock drilling23%
Y10TTechnical subjects covered by former us classification15%
C08LCompositions of macromolecular compounds8%
F16LPipes8%
H01BCables8%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
PatentTitleYear
11,006,484Shielded fluoropolymer wire for high temperature skin effect trace heating20219,556,709'Skin effect heating system having improved heat transfer and wire support characteristics'20179,416,640'Downhole wellbore heating system and method'20167,568,526'Subterranean electro-thermal heating system and method'20094,617,449'Heating device for utilizing the skin effect of alternating current'19864,532,375'Heating device for utilizing the skin effect of alternating current'19854,436,565'Method of making a heating device for utilizing the skin effect of alternating current'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984–1986Patents assigned to RICWIL INC (3)· patent assignee history
1984–1986Based in Medina, OH, US· patent location history
2009–2021Based in San Ramon, CA, US· patent location history
2016–2017Patents assigned to PARMAN DAVID G (2)· patent assignee history
2016–2017Patents assigned to PENTAIR THERMAL MAN LLC (2)· patent assignee history
2016Patents assigned to FARZANEH FARDIN (1)· patent assignee history
2016Based in San Bernardino, CA, US· patent location history
2021Patents assigned to NVENT SERVICES GMBH (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
RICWIL INC31984–1986
PARMAN DAVID Gself22016–2017
PENTAIR THERMAL MAN LLC22016–2017
FARZANEH FARDIN12016
NVENT SERVICES GMBH12021
Locations
LocationPatentsSpan
San Ramon, California, US32009–2021
Medina, OH, US31984–1986
San Bernardino, California, US12016