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Inventor

John A. VanHoogstrate

Inventor
St. Peters, MO, US

Overview

4→
Patents
1984–2000
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.

G03Bprimary
G03BApparatus or arrangements for taking photographs or for projecting or viewing them25%
G09BEducational or demonstration appliances25%
H04NPictorial communication, e.g. television25%
G02BOptical elements, systems or apparatus13%
G06FElectric digital data processing13%
PatentTitleYear
6,152,739'Visual display system for producing a continuous virtual image'20004,931,859'Schlieren color television image aperturing device'19904,814,866'Schlieren color television image aperturing device'19894,427,274'Wide angle projection system'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984–2000Patents assigned to MC DONNELL DOUGLAS CORP (4)· patent assignee history
1984Based in St. Louis, MO, US· patent location history
1989–2000Based in St. Peters, MO, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MC DONNELL DOUGLAS CORP41984–2000
Locations
LocationPatentsSpan
St. Peters, MO, US31989–2000
St. Louis, MO, US11984