Inventor

John F. Duvall

Inventor

Highlands Ranch, CO, US

Overview

1983–2002

Patent span

Performing operations

Primary field (CPC B)

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

H02Gprimary

H02GInstallation of electric cables or lines, or of combined optical and electric cables or lines18%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests18%

A42BHats9%

B04CApparatus using free vortex flow, e.g. cyclones9%

B62LBrakes specially adapted for cycles9%

C07DHeterocyclic compounds9%

F16DCouplings for transmitting rotation9%

G02BOptical elements, systems or apparatus9%

LOC129%

PatentTitleYear

Assembled from patent assignee/location history and declaration credentials.

1983Patents assigned to EASTMAN KODAK CO (1)· patent assignee history

1983Based in Liverpool, GB· patent location history

1988Patents assigned to WILFLEY & SONS INC A (1)· patent assignee history

1988Based in Buffalo, NY, US· patent location history

1991Patents assigned to DUVALL JOHN F (1)· patent assignee history

1991Based in Englewood, CO, US· patent location history

1999Patents assigned to CHEMPRO INC (1)· patent assignee history

1999–2002Based in Highlands Ranch, CO, US· patent location history

2001–2002Patents assigned to CHECKERS IND PRODUCTS INC (2)· patent assignee history

Assignee and location history derived from the patent record.

Assignees

Locations