Inventor

David W. Perkins

Inventor

Hiawatha, IA, US

Overview

20→

Patents

1994–2021

Patent span

Performing operations

Primary field (CPC B)

Patents· 20 as inventor

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

B65Dprimary

B65DContainers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers78%

A61BDiagnosis4%

F16BDevices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges4%

H02JElectric power networks4%

H04NPictorial communication, e.g. television4%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution4%

PatentTitleYear

11,096,627Medical examination system enabling interchangeable instrument operating modes2021 D0926128Charger2021 10,273,070Collapsible container2019 9,302,806'Collapsible container with improved corners'2016 8,016,145'Collapsible bulk container'2011 8,016,113'Storage system with improved pole securement system'2011 7,819,269'Bulk container'2010 7,628,310'Interlocking container'2009 6,834,792'Interlocking container'2004 6,575,629'Collapsible bag'2003 6,516,965'Stackable collapsible container'2003 6,164,453'Bulk container'2000 6,000,549'Bulk container'1999 5,813,562'Fluent container'1998 5,775,541'Liquid container and valve'1998 5,660,119'Lightweight structural beam'1997 5,579,953'Liquid container and valve'1996 5,549,341'Apparatus for securing contained material'1996 5,353,982'Fluent container'1994 5,340,180'Apparatus for securing contained material'1994

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1994–2019Patents assigned to PAPER SYSTEMS INC (10)· patent assignee history

1994–2011Based in Hiawatha, IA, US· patent location history

1996–2011Patents assigned to PLASTIC SYSTEMS INC (8)· patent assignee history

2016–2019Patents assigned to PERKINS DAVID W (2)· patent assignee history

2016–2019Based in Cedar Rapids, IA, US· patent location history

2019Patents assigned to CHASE WILLIAM L (1)· patent assignee history

2021Patents assigned to WELCH ALLYN INC (2)· patent assignee history

2021Based in Tully, NY, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
PAPER SYSTEMS INC	10	1994–2019
PLASTIC SYSTEMS INC	8	1996–2011
PERKINS DAVID Wself	2	2016–2019
WELCH ALLYN INC	2	2021
CHASE WILLIAM L	1	2019

Locations

Location	Patents	Span
Hiawatha, IA, US	16	1994–2011
Tully, New York, US	2	2021
Cedar Rapids, IA, US	2	2016–2019