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Inventor

Roger D. Sheppard

Inventor
Santa Rosa, CA, US

Overview

3→
Patents
1991–2012
Patent span
Electricity
Primary field (CPC H)

Patents· 3 as inventor

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

H03Mprimary
H03MCoding50%
H03BGeneration of oscillations, directly or by frequency-changing, by circuits employing active elements which operate in a non-switching manner25%
H03CModulation25%
PatentTitleYear
8,164,503'Data converter system that avoids interleave images and distortion products'20125,844,512'Autoranging apparatus and method for improved dynamic ranging in analog to digital converters'19985,023,571'Digitally-synchronized sweep signal source'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–1998Patents assigned to HEWLETT PACKARD CO (2)· patent assignee history
1991–1998Based in Santa Rosa, CA, US· patent location history
2012Patents assigned to SHEPPARD ROGER D (1)· patent assignee history
2012Patents assigned to TEKTRONIX INC (1)· patent assignee history
2012Based in Portland, OR, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HEWLETT PACKARD CO21991–1998
SHEPPARD ROGER Dself12012
TEKTRONIX INC12012
Locations
LocationPatentsSpan
Santa Rosa, California, US21991–1998
Portland, OR, US12012