Donald J. Ersler, S.C.

Attorney Ersler Patent Specialty Areas

I specialize in the following areas: building products, construction, medical, healthcare, sporting goods, archery, firearm accessories and parts, electronic devices, energy saving products, tools, heavy equipment and safety devices.  Contact me if your invention area is not on the list.

Building Products

Single Container Wind Resistant Modular ISO Building, Pat No. 10,000,939
Metal Nailer with Adjustable Curvature, Pat No. 9,816,268

High Snow Load Ridge Ventilator, Pat No. 9,657,480

Customizable Ridge Ventilator, Pat. No. 8,075,376

Medical And Healthcare

Stratification Detection And Aerosol Distribution System, Pat No. 10,029,274
Fluid Flow Rate Measuring Device, Pat No. 9,964,421

Method And Apparatus For Optimizing Aerosol Generation, Pat. No. 8,074,896

Room Monitor For Critical Environment Rooms, Pat. No. 8,068,021

Sporting Goods

Automatic Processing Press, Pat No. 10,076,781

Reverse Style Crossbow Having For Cable Pulleys, Pat No. 9,879,938

Fishing Hook Threader And Holder, Pat. No. 7,788,844

Golf Club Face Impact Alignment Device, Pat. No. 6,923,728

Electronic Devices

Audio Ear Buds, Pat No. 10,178,461

Fiber quality transducer, Pat. No. 7,701,575

Apparatus Providing Vision Enhancement Dentistry, Pat. No. 7,443,417

Energy Saving Products

Mobile Diesel Generator And Power Propulsion System, Pat No. 10,164,502

Thermal Energy Accumulator For Power Generation, Pat No. 10,020,436

Seamless Sheet Insulation Around Roof Structural Members, Pat No. 9,863,152

Hydroelectric power system, Pat. No. 8,058,741

Wind turbine with improved cooling, Pat. No. 7,963,743

Tools

Linesman Pliers, Pat No. 10,014,672

Hydraulic Hose End Expansion Chamber, Pat No. 10,012,244

Tire repair tools, Pat. No. 7,757,585

Case Trimmer And Chamfer Tool, Pat. No.  7,650,825

Mechanical Inventions

Hitch Adapters, Pat No. 9,566,837

Flange Clamp, Pat No. 9,512,944

Load Leveler For Different Width Open Semi-Trailers, Pat. No. 8,061,943

Anti-back drive system, Pat. No. 7,861,840

Heavy Equipment

Extraction Tongs With Replaceable Jaw Tips, Pat No. 9,815,128

Load Leveler For Different Width Open Semi-Trailers, Pat. No. 8,061,943

Rotary Dangle Head Having Continuous Rotation, Pat. No. 7735,530

Safety Devices

Body Protective Padding With Non-Bursting Gas Cells, Pat No. 10,105,584

Emergency Descender Device, Pat No. 10,035,028

Assisted Rescue And Personal Evacuation System, Pat No. 9,517,362

Motorcycle Accessories

Cycle Bag With An Adjustable Retention Device, Pat. No. 7,775,411

Removable Cooling Fan Kit For A Motorcycle Engine, Pat. No. 7,303,034

Archery Patent List

Bow Cams/Pulleys/Cables/Timing: 9097486, 9115953, 9234719, 9377267, 9752842, 9879938, 10139189, 10371480, 10514227, 10690436, 10948257, 10989492, 12018909 and 12460891

Crossbow Cranking: 9752844, 10421637, 10359254, 10408560, 10458743, 10948257, 10996018, 11131524, 11156429, 11268781, 11346632, 11629928, 12025402, 12215954, 12247803 and 12379180  

Projectile Launching: 9759509, 9829268, 9945634, 10048036, 10386152, 10458742, 11022398, 11112205, 11371795, 11378350, 11499792, 12025402 and 12379180

Bow Limbs: 10018442, 10126089, 10139191 and 10145643

Barrels/Frames: 9038619, 9291421 and 9696107 

Arrows, Nocks and Arrow Points: D717389, D813970, D888866, D903034, 8951152, 8967133, 9212875, 9395166, 9441927, 9915510, 9982975, 10001353, 10094642, 10359254, 10928167, 11598614, 11828581 and 11946731

Inserts/Outserts: 8403777, 8668605, 10203185, 10859354 and 11098994  

Stabilizers/Dampening: 9759510, 9759510, 9797723, 9816815, 9909833, 10240886 and 11933579

Arrow Rests: 8875687 and 10415924,

Broadheads: 9303962 and 9803963

String Stops: 9097487 and 10215521

Trigger Related: 9551544, 10012468, 10066894, 10215522, 11421955 and 11525646

Accessories/Tools: D958554, D1096916, 8608531, 9046452, 9372045, 10099889, 11025811, 10837738, 10948258, 11365950 and 11933579