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Inventor

Robert A. Hummel

Inventor
Cambridge, MA, US

Overview

5→
Patents
1981–2020
Patent span
Electricity
Primary field (CPC H)

Patents· 5 as inventor

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

H02Mprimary
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems30%
H05KPrinted circuits30%
A61FFilters implantable into blood vessels10%
B28BShaping clay or other ceramic compositions10%
G05DSystems for controlling or regulating non-electric variables10%
H05BElectric heating10%
PatentTitleYear
10,743,376High power switching devices for inductive heating applications202010,454,388Power converter201910,027,251Power converter20185,316,465'Apparatus for providing random rake finish in a cast concrete surface'19944,280,232'Intraocular lens device'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981Patents assigned to HUMMEL ROBERT A (1)· patent assignee history
1981Based in Oklahoma City, OK, US· patent location history
1994Patents assigned to REINFORCED EARTH CO (1)· patent assignee history
1994Based in Clifton, VA, US· patent location history
2018–2020Patents assigned to ATSE LLC (3)· patent assignee history
2018–2020Based in Cambridge, MA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ATSE LLC32018–2020
HUMMEL ROBERT Aself11981
REINFORCED EARTH CO11994
Locations
LocationPatentsSpan
Cambridge, Massachusetts, US32018–2020
Clifton, Virginia, US11994
Oklahoma City, OK, US11981