Inventor

Richard E. Liebetrau

Inventor

Cadillac, MI, US

Overview

5→

Patents

1977–1990

Patent span

Fixed constructions

Primary field (CPC E)

Patents· 5 as inventor

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

E06Bprimary

E06BFixed or movable closures for openings in buildings, vehicles, fences or like enclosures in general, e.g. doors, windows, blinds, gates15%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests15%

A47BTables8%

A47FSpecial furniture, fittings, or accessories for shops, storehouses, bars, restaurants or the like8%

B23QDetails, components, or accessories for machine tools, e.g. arrangements for copying or controlling8%

E04FFinishing work on buildings, e.g. stairs, floors8%

E05FDevices for moving wings into open or closed position8%

E05GSafes or strong-rooms for valuables8%

E05YIndexing scheme associated with subclasses e05d and e05f, relating to construction elements, electric control, power supply, power signal or transmission, user interfaces, mounting or coupling, details, accessories, auxiliary operations not otherwise provided for, application thereof8%

F16PSafety devices in general8%

PatentTitleYear

4,896,473'Method of converting to a security glazing system'1990 4,597,698'Wall structure for machine enclosures'1986 4,571,902'Panel mounting system and method for mounting panels'1986 4,060,935'Revolving door with security locking mechanism'1977 4,030,609'Storage and display apparatus employing cantilevered roller track'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977Patents assigned to ALUSUISSE (2)· patent assignee history

1977–1990Based in Cadillac, MI, US· patent location history

1986–1990Patents assigned to LIEBETRAU RICHARD E (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
LIEBETRAU RICHARD Eself	3	1986–1990
ALUSUISSE	2	1977

Locations

Location	Patents	Span
Cadillac, MI, US	5	1977–1990