Inventor

H. Erwin Grellmann

Inventor

Beaverton, OR, US

Overview

16→

Patents

1986–2012

Patent span

Electricity

Primary field (CPC H)

Patents· 16 as inventor

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

B41Jprimary

B41JTypewriters24%

G03GElectrography14%

H01PWaveguides14%

Y10TTechnical subjects covered by former us classification10%

B65DContainers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers7%

H01HElectric switches7%

H01RElectrically-conductive connections7%

F16BDevices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges3%

H01GCapacitors3%

H03HImpedance networks, e.g. resonant circuits3%

PatentTitleYear

8,224,214'Collapsible packaging system'2012 7,959,270'Collapsible packaging system'2011 7,758,173'Collapsible packaging system'2010 7,682,010'Solid ink stick with coating'2010 7,577,384'Collapsible packaging system'2009 5,975,690'Solid ink stick supply system'1999 5,917,528'Solid ink stick supply apparatus and method'1999 5,109,177'Damped cradle for saw device'1992 4,831,222'Integrated pad switch'1989 4,789,791'Rotary drive mechanism'1988 4,721,481'Replaceable RF connector'1988 4,695,811'High frequency coaxial switch'1987 4,686,492'Impedance match connection using multiple layers of bond wires'1987 4,670,723'Broad band, thin film attenuator and method for construction thereof'1987 4,657,322'Microwave interconnect'1987 4,598,334'Capacitive tuning screw'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–1999Patents assigned to TEKTRONIX INC (11)· patent assignee history

1986–2012Based in Beaverton, OR, US· patent location history

1999Based in Aloha, OR, US· patent location history

2009–2012Patents assigned to XEROX CORP (5)· patent assignee history

2012Patents assigned to DURHAM MICHELE KAYLA MAE (1)· patent assignee history

2012Patents assigned to GRELLMANN HEINZ ERWIN (1)· patent assignee history

2012Patents assigned to TIDRICK ROBERT C (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TEKTRONIX INC	11	1986–1999
XEROX CORP	5	2009–2012
DURHAM MICHELE KAYLA MAE	1	2012
GRELLMANN HEINZ ERWINself	1	2012
TIDRICK ROBERT C	1	2012

Locations

Location	Patents	Span
Beaverton, OR, US	14	1986–2012
Aloha, OR, US	2	1999