Inventor

Robert Birch

Inventor

Redmond, WA, US

Overview

4→

Patents

1981–2021

Patent span

Physics

Primary field (CPC G)

Patents· 4 as inventor

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

H04Nprimary

H04NPictorial communication, e.g. television29%

B60HArrangements of heating, cooling, ventilating or other air-treating devices specially adapted for passenger or goods spaces of vehicles14%

F02MSupplying combustion engines in general with combustible mixtures or constituents thereof14%

G02BOptical elements, systems or apparatus14%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein14%

G06FElectric digital data processing14%

PatentTitleYear

11,115,649Systems and methods for synchronizing eyewear devices with displays2021 10,989,927Image frame synchronization in a near eye display2021 D0316923'Long underwear ensemble'1991 4,269,033'Switching device'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981Patents assigned to BIRCH ROBERT J (1)· patent assignee history

1981Based in Troy, MI, US· patent location history

1991Patents assigned to IM RANDERS AS (1)· patent assignee history

1991Based in Morke, DK· patent location history

2021Patents assigned to FACEBOOK TECH LLC (2)· patent assignee history

2021Based in Redmond, WA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
FACEBOOK TECH LLC	2	2021
BIRCH ROBERT Jself	1	1981
IM RANDERS AS	1	1991

Locations

Location	Patents	Span
Redmond, Washington, US	2	2021
Morke, DK	1	1991
Troy, MI, US	1	1981