Inventor
Mark D. Randa
Inventor
Summit, WI, US
Overview
Patents· 29 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling44%
F16LPipes31%
B23DPlaning4%
B25DPercussive tools4%
E03FSewers4%
B66DCapstans2%
E02FDredging2%
E05CBolts or fastening devices for wings, specially for doors or windows2%
F16BDevices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges2%
H02GInstallation of electric cables or lines, or of combined optical and electric cables or lines2%
PatentTitleYear
11,112,033Pipe extraction assisted by pre-stressed strand202110,969,053Lead pipe spudding prior to extraction or remediation202110,927,602Reversible pneumatic pipe ramming tool202110,883,628Extraction of ductile pipe202110,584,807Extraction of ductile pipe202010,550,989Latch assembly for use with an inversion drum202010,415,722Split ring ram adapter with cam adjustment201910,161,201Powered slip actuation2018D0816456Gut hook bladed pipe slitter20189,566,653'Pipe slitter'20179,512,951'Pipe slitting apparatus'20168,955,586'Beacon assembly'20158,955,613'Pneumatic impact tool'20158,875,811'Joint with check valve for a boring apparatus'20148,181,714'Pneumatic impact piercing tool'20127,255,516'Method and apparatus for replacement of underground pipe'20077,086,808'Method and apparatus for on-grade boring'20067,066,279'Pneumatic ground piercing tool'20067,055,621'Method and apparatus for replacement of underground pipe'20067,028,785'Pneumatic impact piercing tool'20066,953,095'Method and system for operating a reversible pneumatic ground piercing tool'20056,923,270'Pneumatic impact piercing tool'20056,913,091'Method and apparatus for replacement of underground pipe'20056,860,514'Drill string joint'20056,761,507'Method and apparatus for replacement of underground pipe'20046,533,052'Drill bit for impact-assisted directional boring'20036,273,201'Pneumatic ground piercing tool with movable chisel head'20015,687,803'Method for reversing a ground piercing tool'19975,603,383'Reversible pneumatic ground piercing tool'1997Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1997–2021Patents assigned to EARTH TOOL CO LLC (25)· patent assignee history
1997Patents assigned to EARTH TOOL CORP (1)· patent assignee history
1997Based in Muskego, WI, US· patent location history
2001–2018Based in Summit, WI, US· patent location history
2012–2015Patents assigned to RANDA MARK D (4)· patent assignee history
2015Patents assigned to CRANE ROBERT F (1)· patent assignee history
2019–2021Based in Oconomowoc, WI, US· patent location history
2020–2021Patents assigned to CHARLES MACHINE WORKS (5)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| EARTH TOOL CO LLC | 25 | 1997–2021 |
| CHARLES MACHINE WORKS | 5 | 2020–2021 |
| RANDA MARK Dself | 4 | 2012–2015 |
| CRANE ROBERT F | 1 | 2015 |
| EARTH TOOL CORP | 1 | 1997 |
Locations
| Location | Patents | Span |
|---|---|---|
| Summit, WI, US | 20 | 2001–2018 |
| Oconomowoc, WI, US | 7 | 2019–2021 |
| Muskego, WI, US | 2 | 1997 |