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Inventor

Walter Littmann

Inventor
Aerzen, DE

Overview

2→
Patents
2004–2005
Patent span
Performing operations
Primary field (CPC B)

Patents· 2 as inventor

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

B28Dprimary
B28DWorking stone or stone-like materials33%
B06BMethods or apparatus for generating or transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency, e.g. for performing mechanical work in general17%
B24BMachines, devices, or processes for grinding or polishing17%
G10KSound-producing devices17%
Y10TTechnical subjects covered by former us classification17%
PatentTitleYear
6,948,574'Ultrasonic annular core bit'20056,731,047'Device with ultrasound adapter'2004

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2004–2005Patents assigned to HILTI AG (2)· patent assignee history
2004–2005Based in Aerzen, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HILTI AG22004–2005
Locations
LocationPatentsSpan
Aerzen, DE22004–2005