Inventor
Walter A. Helm
Inventor
Farmington, CT, US
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling33%
G04GElectronic time-pieces13%
F05BIndexing scheme relating to wind, spring, weight, inertia or like motors, to machines or engines for liquids covered by subclasses f03b, f03d and f03g7%
G01DMeasuring not specially adapted for a specific variable7%
G01LMeasuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure7%
G02BOptical elements, systems or apparatus7%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein7%
G04RRadio-controlled time-pieces7%
H04BTransmission7%
Y10TTechnical subjects covered by former us classification7%
PatentTitleYear
6,310,990'Tunable optical structure featuring feedback control'20016,105,690'Method and apparatus for communicating with devices downhole in a well especially adapted for use as a bottom hole mud flow sensor'20005,922,058'Optical transmission system for generating first-edge-based serial data bit stream by inverting control output line at mark times'19995,835,388'Apparatus and method for optical transmission of serial data using a serial communications port'19985,777,950'Method and apparatus for transferring time information to a watch'19985,128,867'Method and apparatus for determining inclination angle of a borehole while drilling'19925,034,929'Means for varying MWD tool operating modes from the surface'19915,012,412'Method and apparatus for measurement of azimuth of a borehole while drilling'19914,992,787'Method and apparatus for remote signal entry into measurement while drilling system'1991Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1991–1992Patents assigned to TELECO OILFIELD SERVICES INC (4)· patent assignee history
1991–1992Based in Plainville, CT, US· patent location history
1998–1999Patents assigned to TIMEX CORP (3)· patent assignee history
1998–2001Based in Farmington, CT, US· patent location history
1999Patents assigned to MICROSOFT CORP (1)· patent assignee history
2000Patents assigned to APS TECHNOLOGY INC (1)· patent assignee history
2001Patents assigned to CIDRA CORP (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| TELECO OILFIELD SERVICES INC | 4 | 1991–1992 |
| TIMEX CORP | 3 | 1998–1999 |
| APS TECHNOLOGY INC | 1 | 2000 |
| CIDRA CORP | 1 | 2001 |
| MICROSOFT CORP | 1 | 1999 |
Locations
| Location | Patents | Span |
|---|---|---|
| Farmington, CT, US | 5 | 1998–2001 |
| Plainville, CT, US | 4 | 1991–1992 |