Inventor

Douglas M. Bowen

Inventor

Russellville, AR, US

Overview

8→

Patents

1996–2021

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 8 as inventor

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

G09Fprimary

G09FDisplaying32%

B42DBooks26%

F16CShafts21%

A63HToys, e.g. tops, dolls, hoops or building blocks5%

F02BInternal-combustion piston engines5%

F05CIndexing scheme relating to materials, material properties or material characteristics for machines, engines or pumps other than non-positive-displacement machines or engines5%

H02KDynamo-electric machines5%

PatentTitleYear

11,004,361Flexible drive shaft for greeting cards and the like2021 10,984,680Greeting card lever and spiral lift2021 10,515,568Flexible drive shaft for greeting cards and the like2019 10,089,904Flexible drive shaft for greeting cards and the like2018 9,830,836Flexible drive shaft for greeting cards and the like2017 8,881,439'Greeting card with spinner activated multimedia content'2014 5,555,853'Lightweight back-pack generator set having a spark-ignited engine operating on middle distillate fuels'1996 5,554,902'Lightweight high power electromotive device and method for making same'1996

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1996Patents assigned to LIBBY CORP (1)· patent assignee history

1996Based in Overland Park, KS, US· patent location history

2014–2021Patents assigned to HALLMARK CARDS (6)· patent assignee history

2014Based in Fitchburg, MA, US· patent location history

2017–2021Based in Russellville, AR, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HALLMARK CARDS	6	2014–2021
LIBBY CORP	1	1996

Locations

Location	Patents	Span
Russellville, AR, US	5	2017–2021
Overland Park, KS, US	2	1996
Fitchburg, Massachusetts, US	1	2014