LexDanaLexDanabeta
Inventor

Hans Warntjes

Inventor
Dronten, NL

Overview

2→
Patents
2011–2016
Patent span
Human necessities
Primary field (CPC A)

Patents· 2 as inventor

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

A61Bprimary
A61BDiagnosis67%
G02CSpectacles33%
PatentTitleYear
9,492,075'Prism prescription value acquisition system, acquisition method, acquisition apparatus and program for correcting fixation disparity'20167,996,997'Spectacle measuring tool'2011

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2011–2016Patents assigned to HOYA CORP (2)· patent assignee history
2011Based in Tokyo, JP· patent location history
2016Based in Dronten, NL· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HOYA CORP22011–2016
Locations
LocationPatentsSpan
Dronten, NL12016
Tokyo, JP12011